Binojkumar, M. S., and N. P. Balakrishnan. “Taxonomic Notes on Euphorbia Himalayensis (Klotzsch) Boiss. And Allied Species (Euphorbiaceae)”. Rheedea, vol. 2, no. 2, Dec. 1992, pp. 75-79, https://doi.org/10.22244/rheedea.1992.02.02.01.