Krachai, P., and P. Chantaranothai. “Pollen morphology of Cassia s.l. (Leguminosae) and its taxonomic implications (Thai)”. Asia-Pacific Journal of Science and Technology, vol. 14, no. 1, Apr. 2017, pp. 16-25, https://so01.tci-thaijo.org/index.php/APST/article/view/83087.