RAHMAYANTI, Maya; HANIM, Husnul; NUR AZIZAH, Divya. Optimization of Biodiesel Production Conditions from Waste Cooking Oil using Parkia speciosa Hassk. Peel Extracts - Modified Magnetite (Fe3O4-PSH) as Catalyst. Karya International Journal of Biofuel and Bioenergy , [S. l.], v. 1, n. 1, p. 14–28, 2025. DOI: 10.37934/kijbb.1.1.1428. Disponível em: http://karyailham.com.my/index.php/kijbb/article/view/105. Acesso em: 9 aug. 2026.