Maroa, Semakula, and Freddie Inambao. “The Effect of Cetane Number and Oxygen Content in the Performance and Emissions Characteristics of a Diesel Engine Using Biodiesel Blends”. Journal of Energy in Southern Africa, vol. 30, no. 2, June 2019, pp. 1-13, doi:10.17159/2413-3051/2019/v30i2a5337.