Phithakkuncharoen, Wuttichai, Sirawit Sangnak, Arthit Neramittagapong, and Sutasinee Neramittagapong. 2016. “Vanillin production from lignin degradation using hydrothermal method over Fe2O3/Al2O3 catalysts”. Engineering and Applied Science Research 43 (November):84-86. https://ph01.tci-thaijo.org/index.php/easr/article/view/69700.