PORNCHUTI, W., K. THAMMASIRI, N. CHUENBOONNGARM, and N. PANVISAVAS. “Alteration of Spathoglottis Eburnea Gagnep. Ploidy Level After Colchicine Treatments”. Walailak Journal of Science and Technology (WJST), vol. 14, no. 3, Nov. 2015, pp. 243-52, https://wjst.wu.ac.th/index.php/wjst/article/view/1692.