Ngamthanacom, Nutchaporn, Napat Kaewtrakulchai, Weerawut Chaiwat, and Apiluck Eiad-ua. “Influence of Acid Treatment on Nanoporous Carbon from Lignin”. Journal of Materials Science and Applied Energy 7, no. 3 (December 26, 2018): 317–321. Accessed January 31, 2023. https://ph01.tci-thaijo.org/index.php/jmsae_ceae/article/view/125896.