HAFIZ, Ahmad; IBRAHIM, Siti Aida. Effect of Varied Degumming Concentrations on Soap from Used Cooking Oil. Research Progress in Mechanical and Manufacturing Engineering, [S. l.], v. 5, n. 1, p. 435–443, 2024. Disponível em: https://penerbit.uthm.edu.my/periodicals/index.php/rpmme/article/view/15793. Acesso em: 8 apr. 2026.