Nonkratok, Athithan, Piyaporn Saensouk, Surapon Saensouk, and Charun Maknoi. 2017. “Leaf surface anatomy of curcuma L. in Northeastern Thailand”. Asia-Pacific Journal of Science and Technology 17 (3):443-58. https://so01.tci-thaijo.org/index.php/APST/article/view/83258.