“MONTMORILLONITE SURFACE AS A CATALYST FOR THE FORMATION OF SAT METAL TETRA (P-SULPHOPHENYL) PORPHYRINS ”. Jurnal Teknologi (Sciences & Engineering) 82, no. 6 (October 21, 2020): 1–9. Accessed September 13, 2026. https://journals.utm.my/jurnalteknologi/article/view/14564.