Murthy, G. V. S., and M. Sanjappa. “SEM Studies on Seed Morphology of Indigofera L. (Fabaceae) and Its Taxonomic Utility”. Rheedea, vol. 12, no. 1, June 2002, pp. 21-51, https://doi.org/10.22244/rheedea.2002.12.01.02.