Sakhi, F. M., Santoso, A. and Sumari, S. (2025) “Optimization of Palm Bunch Ash-Based Catalysts for the Transesterification of Waste Cooking Oil into Biodiesel”, Jurnal Akademika Kimia. Palu, Sulawesi Tengah - INDONESIA, 14(1), pp. 40–50. doi: 10.22487/j24775185.2025.v14.i1.pp40-50.