[1]
S. Babel, S. Arayawate, E. Faedsura, and H. Sudrajat, “Production of Biodiesel from Waste Cooking Oil Using Transesterification, with the KOH on Carbon Support from Waste Material and Egg Shell, as the Catalyst”, Environ. Nat. Resour. J., vol. 14, no. 2, pp. 60–68, Dec. 2016.