Krachai, P., P. Chataranothai, and P. Pornpongrungrueng. “A varietal classification of Terminalia chebula Retz (Combretaceae)”. Asia-Pacific Journal of Science and Technology, vol. 18, no. 6, Apr. 2017, pp. 937-48, https://so01.tci-thaijo.org/index.php/APST/article/view/83025.