Zambrano, T. Y. M., Mero, T. B. B., Mendoz, V. D. P. and Giler, R. D. G. (2019) “Transesterification of vegetable oil of higuerilla (ricinuscommunis l) for biofuel generation and cost determination”, International journal of life sciences and earth sciences, 3(1), pp. 1-7. doi: 10.31295/ijle.v3n1.96.