Kashyap, S., C. K. Sahu, R. K. Verma, and L. B. Chaudhary. “Taxonomic Application of Macro and Micro Morphological Characters of Seeds in Astragalus L. (Galegeae, Fabaceae) in India”. Phytotaxa, vol. 502, no. 2, May 2021, pp. 191–207, doi:10.11646/phytotaxa.502.2.8.