IQBAL, M. N.; ASHRAF, A. Recent Trends in Animal Fats and Oils to Biodiesel Research: Conversion Methods, Technical Challenges and Assessment of Economic and Environmental Impacts. International Journal of Alternative Fuels and Energy, [S. l.], v. 1, n. 1, p. 21-22, 2017. Disponível em: https://journals.psmpublishers.org/index.php/ijafe/article/view/142. Acesso em: 13 jul. 2020.