Mawarani LJ, Sihombing TA, Risanti DD, Massadeh MI, Prananto D. Utilization of Chicken Eggshells as Catalyst in Biodiesel Synthesis from Waste Cooking Oil: Chicken Eggshells as Catalyst in Biodiesel Synthesis from Waste Cooking Oil. PPASA [Internet]. 2021 Oct. 11 [cited 2025 Mar. 9];58(S):85-9. Available from: https://ppaspk.org/index.php/PPAS-A/article/view/533