M. Karthikeyan, G. Baskar, and S. Renganathan, “Evaluation of Catharanthus roseus Biodiesel as an Alternative Fuel to study the Performance and Emission Characteristics via 4-S Internal Combustion Engine”, Int. J. Ind. Eng., vol. 2, no. 7, pp. 160–166, Jul. 2018, doi: 10.65000/sdpzba41.