Khanam, Mahbuba, et al. “<i>Vernonia pyramidale< I> (D. Don) S. N. Mitra (Compositae) - A New Angiospermic Record for Bangladesh”. Bangladesh Journal of Plant Taxonomy, vol. 11, no. 1, Sept. 2004, pp. 99-102, https://www.banglajol.info/index.php/BJPT/article/view/638.