S. Norhafiza Mohd Khazaai, N. Farah Wahida Abdul Wahid Baki, G. Pragas Maniam, and M. Hasbi Ab. Rahim, “Fatty Acid Methyl Esters Production from Waste Catfish Fat (Pangasius Hypothalamus) Using Barnacle-Zno As A Catalyst”, IJET, vol. 7, no. 3.11, pp. 228–231, Jul. 2018, doi: 10.14419/ijet.v7i3.11.15968.