Eloka-Eboka, A.C., Igbum, O.G. and Inambao, F.L. (2014) “Optimization and effects of process variables on the production and properties of methyl ester biodiesel”, Journal of Energy in Southern Africa, 25(2), pp. 39–47. doi:10.17159/2413-3051/2014/v25i2a2668.