Rujjanawate, C., D. Amomlerdpison, and D. Kanjanapothi. “Gastroprotective Effect of Thai Propolis”. Journal of Basic and Applied Pharmacology, vol. 23, no. 1, July 2015, pp. 9-15, https://li01.tci-thaijo.org/index.php/JBAP/article/view/37509.