Wisdom Chukwuemeke Ulakpa. “Characterization and Optimization Study of Transesterification of Non-Edible Oil Using Response Surface Methodology”. International Journal of Engineering Research and Advanced Technology (ijerat) (E-ISSN 2454-6135) DOI: 10.31695/IJERAT, vol. 7, no. 3, Mar. 2021, pp. 11-22, doi:10.31695/IJERAT.2021.3692.