Begum, H. A., K. Ghosal, and T. Chattopadhyay. “Comparative Morphology and Floral Biology of Three Species of the Genus of <i>Nymphaea</i> From Bangladesh”. Bangladesh Journal of Botany, vol. 39, no. 2, Apr. 2011, pp. 179-83, doi:10.3329/bjb.v39i2.7478.