TRAKARNPRUK W. Biodiesel Production from Palm Fatty Acids Distillate Using Tungstophosphoric Acid- and Cs-salt Immobilized-Silica. Walailak J Sci & Tech [Internet]. 2012Feb.13 [cited 2024Apr.29];9(1):37-4. Available from: https://wjst.wu.ac.th/index.php/wjst/article/view/219