Sipayung, R.; Amalia, R.; Ra’ida Raudhatussya’rifah; Rara Ayu Lestary; Widyastuti, N.; Mundarti, S.; Nazarudin. Utilization of Waste Cooking Oil As Biodiesel for Portable Stoves: Comparison of Homogeneous and Heterogeneous Catalysts. JIPM 2024, 3, 451-461.