Balan, A. P., S. Predeep, P. Udayan, and R. Prakashkumar. “Lectotypification of the Genus Geissaspis Wight & Arn. (Fabaceae-Papilionoideae)”. Bangladesh Journal of Plant Taxonomy, vol. 25, no. 2, Dec. 2018, pp. 289-94, doi:10.3329/bjpt.v25i2.39533.