Changjeraja R, Nuntang S. Synthesis of sulfonated rice husk silica for PFAD esterification: Effect of calcination temperature. Clean Energy Sci. Technol. [Internet]. 2026 Sep. 18 [cited 2026 Sep. 29];4(5). Available from: https://cest.usp-pl.com/index.php/cest/article/view/832