Raskoti, B. B., & Sakya, S. R. (2007). Morphological variation of <i>Swertia chirayita</i> (Roxb. ex Flem.) Karst. Botanica Orientalis: Journal of Plant Science, 4(1), 32–35. Retrieved from https://nepjol.info/index.php/BOTOR/article/view/537