Ihegboro, G.O. et al. 2022. Cytotoxicity Evaluation and the Free Radical Scavenging Activity of the Root Extracts of Calotropis procera: . http://www.doi.org/10.26538/tjnpr/v6i12.30. Tropical Journal of Natural Product Research (TJNPR). 6, 12 (Dec. 2022), 2081–2086.