Gunawan, M. L., C. B. Rasrendra, I. Makertihartha, and L. M. Nisa. “Synthesis of Active Matrix from Kaolin for Cracking Catalyst”. ITB Graduate School Conference, vol. 3, no. 1, Oct. 2023, pp. 740-5, https://gcs.itb.ac.id/proceeding-igsc/index.php/igsc/article/view/189.