TY  - JOUR
AU  - Zlatković, Vesna
AU  - Grahovac, Nada
AU  - Banković Ilić, Ivana
AU  - Mitrović, Petar
AU  - Troter, Dragan
AU  - Todorović, Zoran
AU  - Marjanović-Jeromela, Ana
AU  - Veljković, Vlada
PY  - 2024
UR  - http://fiver.ifvcns.rs/handle/123456789/4331
AB  - This study aims to explore the influence of screw frequency, nozzle diameter, and press head temperature on critical crude fodder radish seed oil (FRSO) yield, throughput, and fatty acid composition. A quadratic equation, developed using response surface methodology, fitted the experimental data for oil yield. It was substantiated by a non-significant lack-of-fit, commendable coefficient-of-determination (R2 = 0.782), and a modest mean relative percentage deviation (±7.27%). The analysis of variance pinpointed the statistical significance of press head temperature, nozzle size, and the squared term of press head temperature. The highest FRSO yield (17.61%)—corresponding to an extraction efficiency of 51.3% was found with a screw frequency of 50 Hz, at 80°C, and an 8 mm nozzle. A linear model highlighted that all three pressing factors significantly influenced the FRSO throughput. FRSO consists of C18:1 (30.9%), C22:1 (20.8%), C18:2 (14.9%), and C18:3 (11.9%), aligning with the compositions reported in other studies on fodder radish oils.
PB  - Wiley
T2  - Journal of Food Process Engineering
T1  - Effects of screw pressing conditions on fodder radish seed oil yield, throughput, and fatty acid profile
IS  - 3
SP  - e14588
VL  - 47
DO  - 10.1111/jfpe.14588
ER  - 

@article{
author = "Zlatković, Vesna and Grahovac, Nada and Banković Ilić, Ivana and Mitrović, Petar and Troter, Dragan and Todorović, Zoran and Marjanović-Jeromela, Ana and Veljković, Vlada",
year = "2024",
abstract = "This study aims to explore the influence of screw frequency, nozzle diameter, and press head temperature on critical crude fodder radish seed oil (FRSO) yield, throughput, and fatty acid composition. A quadratic equation, developed using response surface methodology, fitted the experimental data for oil yield. It was substantiated by a non-significant lack-of-fit, commendable coefficient-of-determination (R2 = 0.782), and a modest mean relative percentage deviation (±7.27%). The analysis of variance pinpointed the statistical significance of press head temperature, nozzle size, and the squared term of press head temperature. The highest FRSO yield (17.61%)—corresponding to an extraction efficiency of 51.3% was found with a screw frequency of 50 Hz, at 80°C, and an 8 mm nozzle. A linear model highlighted that all three pressing factors significantly influenced the FRSO throughput. FRSO consists of C18:1 (30.9%), C22:1 (20.8%), C18:2 (14.9%), and C18:3 (11.9%), aligning with the compositions reported in other studies on fodder radish oils.",
publisher = "Wiley",
journal = "Journal of Food Process Engineering",
title = "Effects of screw pressing conditions on fodder radish seed oil yield, throughput, and fatty acid profile",
number = "3",
pages = "e14588",
volume = "47",
doi = "10.1111/jfpe.14588"
}

Zlatković, V., Grahovac, N., Banković Ilić, I., Mitrović, P., Troter, D., Todorović, Z., Marjanović-Jeromela, A.,& Veljković, V.. (2024). Effects of screw pressing conditions on fodder radish seed oil yield, throughput, and fatty acid profile. in Journal of Food Process Engineering
Wiley., 47(3), e14588.
https://doi.org/10.1111/jfpe.14588

Zlatković V, Grahovac N, Banković Ilić I, Mitrović P, Troter D, Todorović Z, Marjanović-Jeromela A, Veljković V. Effects of screw pressing conditions on fodder radish seed oil yield, throughput, and fatty acid profile. in Journal of Food Process Engineering. 2024;47(3):e14588.
doi:10.1111/jfpe.14588 .

Zlatković, Vesna, Grahovac, Nada, Banković Ilić, Ivana, Mitrović, Petar, Troter, Dragan, Todorović, Zoran, Marjanović-Jeromela, Ana, Veljković, Vlada, "Effects of screw pressing conditions on fodder radish seed oil yield, throughput, and fatty acid profile" in Journal of Food Process Engineering, 47, no. 3 (2024):e14588,
https://doi.org/10.1111/jfpe.14588 . .

TY  - JOUR
AU  - Todorović, Zoran
AU  - Mitrović, Petar
AU  - Zlatković, Vesna
AU  - Grahovac, Nada
AU  - Banković-Ilić, Ivana
AU  - Troter, Dragan
AU  - Marjanović-Jeromela, Ana
AU  - Veljković, Vlada
PY  - 2023
UR  - http://fiver.ifvcns.rs/handle/123456789/3843
AB  - Cold pressing is frequently used to produce high-quality vegetable oils, especially from seeds with high oil content, such as rapeseeds. But, it encounters a challenge from the industrial demand for high oil yield. Modeling the cold pressing process using experimental and statistical approaches would help to understand the effects of cold pressing conditions on oil yield and process efficacy. Therefore, this work aimed to investigate the effects of nozzle diameter (8–12 mm), screw frequency (40–60 Hz), and press head temperature (40–80 °C) on the oil recovery from rapeseeds by cold pressing using response surface methodology coupled with a 33 full factorial design. An extended quadratic equation fitted the experimental data accurately and reproducibly, as proved by the acceptable coefficient-of-determination (R2 = 0.873), a not significant lack-of-fit (p = 0.872), and a very low mean relative percentage deviation (± 6.7%, 35 data). The ANOVA revealed that nozzle diameter, press head temperature, their interaction, three-factor interaction, and squared nozzle diameter influenced pressed oil yield significantly. The optimal condition for obtaining the highest pressed oil yield (26.7%) within the experimental domain was a nozzle diameter of 10 mm, a screw frequency of 50 Hz, and a press head temperature of 80 °C. The crude oil extraction degree achieved by cold pressing was 60.8% compared to the Soxhlet method. The rapeseed oil contains predominantly oleic, linoleic, linolenic, and palmitic acids, agreeing with other reported rapeseed oils.
PB  - Springer Science+Business Media
T2  - Journal of Food Measurement and Characterization
T1  - Optimization of oil recovery from oilseed rape by cold pressing using statistical modeling
DO  - 10.1007/s11694-023-02138-6
ER  - 

@article{
author = "Todorović, Zoran and Mitrović, Petar and Zlatković, Vesna and Grahovac, Nada and Banković-Ilić, Ivana and Troter, Dragan and Marjanović-Jeromela, Ana and Veljković, Vlada",
year = "2023",
abstract = "Cold pressing is frequently used to produce high-quality vegetable oils, especially from seeds with high oil content, such as rapeseeds. But, it encounters a challenge from the industrial demand for high oil yield. Modeling the cold pressing process using experimental and statistical approaches would help to understand the effects of cold pressing conditions on oil yield and process efficacy. Therefore, this work aimed to investigate the effects of nozzle diameter (8–12 mm), screw frequency (40–60 Hz), and press head temperature (40–80 °C) on the oil recovery from rapeseeds by cold pressing using response surface methodology coupled with a 33 full factorial design. An extended quadratic equation fitted the experimental data accurately and reproducibly, as proved by the acceptable coefficient-of-determination (R2 = 0.873), a not significant lack-of-fit (p = 0.872), and a very low mean relative percentage deviation (± 6.7%, 35 data). The ANOVA revealed that nozzle diameter, press head temperature, their interaction, three-factor interaction, and squared nozzle diameter influenced pressed oil yield significantly. The optimal condition for obtaining the highest pressed oil yield (26.7%) within the experimental domain was a nozzle diameter of 10 mm, a screw frequency of 50 Hz, and a press head temperature of 80 °C. The crude oil extraction degree achieved by cold pressing was 60.8% compared to the Soxhlet method. The rapeseed oil contains predominantly oleic, linoleic, linolenic, and palmitic acids, agreeing with other reported rapeseed oils.",
publisher = "Springer Science+Business Media",
journal = "Journal of Food Measurement and Characterization",
title = "Optimization of oil recovery from oilseed rape by cold pressing using statistical modeling",
doi = "10.1007/s11694-023-02138-6"
}

Todorović, Z., Mitrović, P., Zlatković, V., Grahovac, N., Banković-Ilić, I., Troter, D., Marjanović-Jeromela, A.,& Veljković, V.. (2023). Optimization of oil recovery from oilseed rape by cold pressing using statistical modeling. in Journal of Food Measurement and Characterization
Springer Science+Business Media..
https://doi.org/10.1007/s11694-023-02138-6

Todorović Z, Mitrović P, Zlatković V, Grahovac N, Banković-Ilić I, Troter D, Marjanović-Jeromela A, Veljković V. Optimization of oil recovery from oilseed rape by cold pressing using statistical modeling. in Journal of Food Measurement and Characterization. 2023;.
doi:10.1007/s11694-023-02138-6 .

Todorović, Zoran, Mitrović, Petar, Zlatković, Vesna, Grahovac, Nada, Banković-Ilić, Ivana, Troter, Dragan, Marjanović-Jeromela, Ana, Veljković, Vlada, "Optimization of oil recovery from oilseed rape by cold pressing using statistical modeling" in Journal of Food Measurement and Characterization (2023),
https://doi.org/10.1007/s11694-023-02138-6 . .

Miladinović, M., Banković-Ilić, I., Đalović, I., Mitrović, P., Stamenković, O.,& Veljković, V.. (2020). Metanoliza suncokretovog ulja katalizovana pepelom koštica višnje. .
https://hdl.handle.net/21.15107/rcub_fiver_3973

Miladinović M, Banković-Ilić I, Đalović I, Mitrović P, Stamenković O, Veljković V. Metanoliza suncokretovog ulja katalizovana pepelom koštica višnje. 2020;.
https://hdl.handle.net/21.15107/rcub_fiver_3973 .

Miladinović, Marija, Banković-Ilić, Ivana, Đalović, Ivica, Mitrović, Petar, Stamenković, Olivera, Veljković, V., "Metanoliza suncokretovog ulja katalizovana pepelom koštica višnje" (2020),
https://hdl.handle.net/21.15107/rcub_fiver_3973 .

TY  - JOUR
AU  - Mitrović, Petar
AU  - Stamenković, Olivera S.
AU  - Banković-Ilić, Ivana B.
AU  - Đalović, Ivica
AU  - Njezić, Zvonko B.
AU  - Farooq, Muhammad
AU  - Siddique, Kadambot H. M.
AU  - Veljković, Vlada B.
PY  - 2020
UR  - http://fiver.ifvcns.rs/handle/123456789/2064
AB  - White mustard (Sinapis alba L.) seed oil is used for cooking, food preservation, body and hair revitalization, biodiesel production, and as a diesel fuel additive and alternative biofuel. This review focuses on biodiesel production from white mustard seed oil as a feedstock. The review starts by outlining the botany and cultivation of white mustard plants, seed harvest, drying and storage, and seed oil composition and properties. This is followed by white mustard seed pretreatments (shelling, preheating, and grinding) and processing techniques for oil recovery (pressing, solvent extraction, and steam distillation) from whole seeds, ground seed or kernels, and press cake. Novel technologies, such as aqueous, enzyme-assisted aqueous, supercritical CO2, and ultrasound-assisted solvent extraction, are also discussed. The main part of the review considers biodiesel production from white mustard seed oil, including fuel properties and performance. The economic, environmental, social, and human health risk/toxicological impacts of white mustard-based biodiesel production and use are also discussed.
PB  - Frontiers Media Sa, Lausanne
T2  - Frontiers in Plant Science
T1  - White Mustard (Sinapis alba L.) Oil in Biodiesel Production: A Review
VL  - 11
DO  - 10.3389/fpls.2020.00299
ER  - 

@article{
author = "Mitrović, Petar and Stamenković, Olivera S. and Banković-Ilić, Ivana B. and Đalović, Ivica and Njezić, Zvonko B. and Farooq, Muhammad and Siddique, Kadambot H. M. and Veljković, Vlada B.",
year = "2020",
abstract = "White mustard (Sinapis alba L.) seed oil is used for cooking, food preservation, body and hair revitalization, biodiesel production, and as a diesel fuel additive and alternative biofuel. This review focuses on biodiesel production from white mustard seed oil as a feedstock. The review starts by outlining the botany and cultivation of white mustard plants, seed harvest, drying and storage, and seed oil composition and properties. This is followed by white mustard seed pretreatments (shelling, preheating, and grinding) and processing techniques for oil recovery (pressing, solvent extraction, and steam distillation) from whole seeds, ground seed or kernels, and press cake. Novel technologies, such as aqueous, enzyme-assisted aqueous, supercritical CO2, and ultrasound-assisted solvent extraction, are also discussed. The main part of the review considers biodiesel production from white mustard seed oil, including fuel properties and performance. The economic, environmental, social, and human health risk/toxicological impacts of white mustard-based biodiesel production and use are also discussed.",
publisher = "Frontiers Media Sa, Lausanne",
journal = "Frontiers in Plant Science",
title = "White Mustard (Sinapis alba L.) Oil in Biodiesel Production: A Review",
volume = "11",
doi = "10.3389/fpls.2020.00299"
}

Mitrović, P., Stamenković, O. S., Banković-Ilić, I. B., Đalović, I., Njezić, Z. B., Farooq, M., Siddique, K. H. M.,& Veljković, V. B.. (2020). White Mustard (Sinapis alba L.) Oil in Biodiesel Production: A Review. in Frontiers in Plant Science
Frontiers Media Sa, Lausanne., 11.
https://doi.org/10.3389/fpls.2020.00299

Mitrović P, Stamenković OS, Banković-Ilić IB, Đalović I, Njezić ZB, Farooq M, Siddique KHM, Veljković VB. White Mustard (Sinapis alba L.) Oil in Biodiesel Production: A Review. in Frontiers in Plant Science. 2020;11.
doi:10.3389/fpls.2020.00299 .

Mitrović, Petar, Stamenković, Olivera S., Banković-Ilić, Ivana B., Đalović, Ivica, Njezić, Zvonko B., Farooq, Muhammad, Siddique, Kadambot H. M., Veljković, Vlada B., "White Mustard (Sinapis alba L.) Oil in Biodiesel Production: A Review" in Frontiers in Plant Science, 11 (2020),
https://doi.org/10.3389/fpls.2020.00299 . .

TY  - JOUR
AU  - Stamenković, Olivera S.
AU  - Siliveru, Kaliramesh
AU  - Veljković, Vlada B.
AU  - Banković-Ilić, Ivana B.
AU  - Tasić, Marija B.
AU  - Ciampitti, Ignacio A.
AU  - Đalović, Ivica
AU  - Mitrović, Petar
AU  - Sikora, Vladimir
AU  - Prasad, P. V. V.
PY  - 2020
UR  - http://fiver.ifvcns.rs/handle/123456789/1963
AB  - Sorghum is an important crop that serve multiple purposes as human food, animal feed, and bioenergy production. There are opportunities to produce different types of biofuels from sorghum-based biomass. Sorghum with its vast genetic resources can serve as bioenergy crop and not compete against the value of it as food and nutritional security crop. Bioenegy crops provides an opportunity for agriculture to be part of solution for energy and mitigation to climate change. This review provides detailed overview and current knowledge on the conversion of sorghum biomass (stalks, leaves, and grains) into liquid (bioethanol, biodiesel, and bio-oil), gas (biohydrogen, biogas, and syngas) and solid (biochar) biofuels. Progress made in the different sorghum-based biomass pretreatment and conversion processes including chemical, biochemical, thermochemical and biological processes (e.g. saccharification, fermentation, transesterification, hydrothermal liquefaction, pyrolysis, and gasification) are highlighted and described. In addition, several value-added products from sorghum gaining importance in biofuels production are summarized. Finally, the potential outlook on sorghum based biorefiners and potential for improving sorghum-based biofuel production is presented and discussed. The biorefinery concept offers a considerable scope for optimization of sorghum biomass utilization to produce biofuels and biochemicals. However, there is further need to clearly identify the best methods of pre-treatment, processing, and products from different sources. Sorghum with its high biomass production and multiple use has the potential to be key biofuel crop. Further research is needed to identify most efficient and cost effective processes to ensure the value of biofuel and other bioproducts from sorghum. A complete lifecycle analyses indicating the challenges and opportunities to enhance the efficiency, benefits, and challenges in different steps and finding solutions to overcome those challenges will be of prime importance. Strong collaboration between private and public sector researhcers and multidisciplinary teams will be required to develop a comprehensive biorefinery models.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Renewable & Sustainable Energy Reviews
T1  - Production of biofuels from sorghum
VL  - 124
DO  - 10.1016/j.rser.2020.109769
ER  - 

@article{
author = "Stamenković, Olivera S. and Siliveru, Kaliramesh and Veljković, Vlada B. and Banković-Ilić, Ivana B. and Tasić, Marija B. and Ciampitti, Ignacio A. and Đalović, Ivica and Mitrović, Petar and Sikora, Vladimir and Prasad, P. V. V.",
year = "2020",
abstract = "Sorghum is an important crop that serve multiple purposes as human food, animal feed, and bioenergy production. There are opportunities to produce different types of biofuels from sorghum-based biomass. Sorghum with its vast genetic resources can serve as bioenergy crop and not compete against the value of it as food and nutritional security crop. Bioenegy crops provides an opportunity for agriculture to be part of solution for energy and mitigation to climate change. This review provides detailed overview and current knowledge on the conversion of sorghum biomass (stalks, leaves, and grains) into liquid (bioethanol, biodiesel, and bio-oil), gas (biohydrogen, biogas, and syngas) and solid (biochar) biofuels. Progress made in the different sorghum-based biomass pretreatment and conversion processes including chemical, biochemical, thermochemical and biological processes (e.g. saccharification, fermentation, transesterification, hydrothermal liquefaction, pyrolysis, and gasification) are highlighted and described. In addition, several value-added products from sorghum gaining importance in biofuels production are summarized. Finally, the potential outlook on sorghum based biorefiners and potential for improving sorghum-based biofuel production is presented and discussed. The biorefinery concept offers a considerable scope for optimization of sorghum biomass utilization to produce biofuels and biochemicals. However, there is further need to clearly identify the best methods of pre-treatment, processing, and products from different sources. Sorghum with its high biomass production and multiple use has the potential to be key biofuel crop. Further research is needed to identify most efficient and cost effective processes to ensure the value of biofuel and other bioproducts from sorghum. A complete lifecycle analyses indicating the challenges and opportunities to enhance the efficiency, benefits, and challenges in different steps and finding solutions to overcome those challenges will be of prime importance. Strong collaboration between private and public sector researhcers and multidisciplinary teams will be required to develop a comprehensive biorefinery models.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Renewable & Sustainable Energy Reviews",
title = "Production of biofuels from sorghum",
volume = "124",
doi = "10.1016/j.rser.2020.109769"
}

Stamenković, O. S., Siliveru, K., Veljković, V. B., Banković-Ilić, I. B., Tasić, M. B., Ciampitti, I. A., Đalović, I., Mitrović, P., Sikora, V.,& Prasad, P. V. V.. (2020). Production of biofuels from sorghum. in Renewable & Sustainable Energy Reviews
Pergamon-Elsevier Science Ltd, Oxford., 124.
https://doi.org/10.1016/j.rser.2020.109769

Stamenković OS, Siliveru K, Veljković VB, Banković-Ilić IB, Tasić MB, Ciampitti IA, Đalović I, Mitrović P, Sikora V, Prasad PVV. Production of biofuels from sorghum. in Renewable & Sustainable Energy Reviews. 2020;124.
doi:10.1016/j.rser.2020.109769 .

Stamenković, Olivera S., Siliveru, Kaliramesh, Veljković, Vlada B., Banković-Ilić, Ivana B., Tasić, Marija B., Ciampitti, Ignacio A., Đalović, Ivica, Mitrović, Petar, Sikora, Vladimir, Prasad, P. V. V., "Production of biofuels from sorghum" in Renewable & Sustainable Energy Reviews, 124 (2020),
https://doi.org/10.1016/j.rser.2020.109769 . .

TY  - JOUR
AU  - Veljković, Vlada B.
AU  - Biberdžić, Milan O.
AU  - Banković-Ilić, Ivana B.
AU  - Đalović, Ivica
AU  - Tasić, Marija B.
AU  - Njezić, Zvonko B.
AU  - Stamenković, Olivera S.
PY  - 2018
UR  - http://fiver.ifvcns.rs/handle/123456789/1826
AB  - This paper deals with biodiesel production from corn oil as a feedstock via the transesterification and esterification reactions. To date, corn oil has not been considered a viable biodiesel feedstock because of its high edible value and relatively high price, but some industrial corn processing co-products, such as corn germ and dried distillers grains with solubles (DDGS), have potential for this application after the extraction of corn distillers oil (CDO). Here, after brief discussion of the issues related to corn botany, cultivation, and use, as well as the corn germ and oil composition, properties and use, the methods of corn processing for germ and DDGS recovery are presented. In addition, the mechanical and solvent extraction techniques for oil recovery from whole ground corn kernels, germs, and DDGS are considered. Furthermore, biodiesel production from corn oil, waste frying corn oil, and CDO is critically analyzed. It is expected that further investigation will be directed toward developing simpler, more effective and energy-saving technologies for biodiesel production from corn oil-based feedstocks, especially from CDO. The integration of biodiesel production directly into corn-based ethanol production will advance the overall economy of industrial plants. Furthermore, the fuel properties, performances and exhaust gas emissions of corn-based biodiesel and its blends with diesel fuel are discussed, taking into account the biodiesel quality standards. Finally, issues related to the environmental and socio-economic impacts of corn-based biodiesel production and use are also tackled.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Renewable & Sustainable Energy Reviews
T1  - Biodiesel production from corn oil: A review
EP  - 548
SP  - 531
VL  - 91
DO  - 10.1016/j.rser.2018.04.024
ER  - 

@article{
author = "Veljković, Vlada B. and Biberdžić, Milan O. and Banković-Ilić, Ivana B. and Đalović, Ivica and Tasić, Marija B. and Njezić, Zvonko B. and Stamenković, Olivera S.",
year = "2018",
abstract = "This paper deals with biodiesel production from corn oil as a feedstock via the transesterification and esterification reactions. To date, corn oil has not been considered a viable biodiesel feedstock because of its high edible value and relatively high price, but some industrial corn processing co-products, such as corn germ and dried distillers grains with solubles (DDGS), have potential for this application after the extraction of corn distillers oil (CDO). Here, after brief discussion of the issues related to corn botany, cultivation, and use, as well as the corn germ and oil composition, properties and use, the methods of corn processing for germ and DDGS recovery are presented. In addition, the mechanical and solvent extraction techniques for oil recovery from whole ground corn kernels, germs, and DDGS are considered. Furthermore, biodiesel production from corn oil, waste frying corn oil, and CDO is critically analyzed. It is expected that further investigation will be directed toward developing simpler, more effective and energy-saving technologies for biodiesel production from corn oil-based feedstocks, especially from CDO. The integration of biodiesel production directly into corn-based ethanol production will advance the overall economy of industrial plants. Furthermore, the fuel properties, performances and exhaust gas emissions of corn-based biodiesel and its blends with diesel fuel are discussed, taking into account the biodiesel quality standards. Finally, issues related to the environmental and socio-economic impacts of corn-based biodiesel production and use are also tackled.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Renewable & Sustainable Energy Reviews",
title = "Biodiesel production from corn oil: A review",
pages = "548-531",
volume = "91",
doi = "10.1016/j.rser.2018.04.024"
}

Veljković, V. B., Biberdžić, M. O., Banković-Ilić, I. B., Đalović, I., Tasić, M. B., Njezić, Z. B.,& Stamenković, O. S.. (2018). Biodiesel production from corn oil: A review. in Renewable & Sustainable Energy Reviews
Pergamon-Elsevier Science Ltd, Oxford., 91, 531-548.
https://doi.org/10.1016/j.rser.2018.04.024

Veljković VB, Biberdžić MO, Banković-Ilić IB, Đalović I, Tasić MB, Njezić ZB, Stamenković OS. Biodiesel production from corn oil: A review. in Renewable & Sustainable Energy Reviews. 2018;91:531-548.
doi:10.1016/j.rser.2018.04.024 .

Veljković, Vlada B., Biberdžić, Milan O., Banković-Ilić, Ivana B., Đalović, Ivica, Tasić, Marija B., Njezić, Zvonko B., Stamenković, Olivera S., "Biodiesel production from corn oil: A review" in Renewable & Sustainable Energy Reviews, 91 (2018):531-548,
https://doi.org/10.1016/j.rser.2018.04.024 . .