Zambrano, T. Y. M., T. B. B. Mero, V. D. P. Mendoz, and R. D. G. Giler. “Transesterification of Vegetable Oil of Higuerilla (ricinuscommunis L) for Biofuel Generation and Cost Determination”. International Journal of Life Sciences and Earth Sciences, vol. 3, no. 1, Sept. 2019, pp. 1-7, doi:10.31295/ijle.v3n1.96.