References
For Sapium
Govaerts, R., D.G. Frodin, and A. Radcliffe-Smith. 2000. World checklist and bibliography of Euphorbiaceae (with Pandaceae). Volumes 1-4. Royal Botanic Gardens, Kew, England. Google Scholar
Kruijt, R.C. 1996. A taxonomic monograph of Sapium Jacq., Anomostachys (Baill.) Hurus., Duvigneaudia J. Léonard and Sclerocroton Hochst. (Euphorbiaceae tribe Hippomaneae). E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart. Google Scholar
Webster, G.L. 2014. Euphorbiaceae. In Kubitzki, K., ed. 2014. The families and genera of vascular plants, XI. Flowering plants – Eudicots – Malpighiales. Springer, Berlin. 331 pp. Google Scholar