Khanam, Mahbuba, M Salar Khan, and Md Abul Hassan. 2003. “Revisionary Study of the Genus <i>Gomphostemma</i> Wall. <i>ex</I> Benth. (Lamiaceae) from Bangladesh”. Bangladesh Journal of Plant Taxonomy 10 (2):1-10. https://banglajol.info/index.php/BJPT/article/view/640.