Pierre, L. L., and M. N. Moses. “Isolation and Characterisation of Stigmasterol and Β -Sitosterol from Odontonema Strictum (Acanthaceae)”. Journal of Innovations in Pharmaceutical and Biological Sciences, vol. 2, no. 1, Jan. 2015, pp. 88-96, https://jipbs.com/index.php/journal/article/view/44.