Mawarani, L. J. ., T. A. . Sihombing, D. D. . Risanti, M. I. . Massadeh, and D. . Prananto. “Utilization of Chicken Eggshells As Catalyst in Biodiesel Synthesis from Waste Cooking Oil: Chicken Eggshells As Catalyst in Biodiesel Synthesis from Waste Cooking Oil”. Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences, vol. 58, no. S, Oct. 2021, pp. 85-95, doi:10.53560/PPASA(58-sp1)737.