Roschat, Wuttichai. “The Optimized Conditions of Ethanolysis Reaction of Palm Oil to Biodiesel Product Using Eggshells-Derived CaO As a Solid Heterogeneous Catalyst”. Journal of Materials Science and Applied Energy 7, no. 2 (August 28, 2018): 295–299. Accessed January 31, 2023. https://ph01.tci-thaijo.org/index.php/jmsae_ceae/article/view/139895.