Chawla, Susmita, and Yogendra Kumar Bansal. “Qualitative and Quantitative Estimation of β-Sitosterol from in Vitro Regenerated Stem Bark and Callus of Helicteres Isora L”. Asian Journal of Pharmaceutical and Clinical Research, vol. 7, no. 3, July 2014, pp. 178-80, https://www.journals.innovareacademics.in/index.php/ajpcr/article/view/1305.