Widayat W, Sumarno RA, Ananda YY, Sulardjaka S, Philia J. Catalytic conversion of palm acid oil and bulk cooking oil to biodiesel using Fe/aluminosilicate. ijirss [Internet]. 2025 Apr. 24 [cited 2026 Jan. 23];8(3):12-29. Available from: http://www.ijirss.com/index.php/ijirss/article/view/6425