Mawarani, Lizda Johar, Thomas Andherson Sihombing, Doty Dewi Risanti, Muhannad Illayan Massadeh, and Dwi 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 58, no. S (October 11, 2021): 85–95. Accessed April 18, 2024. https://ppaspk.org/index.php/PPAS-A/article/view/533.