KSHIPRA SONI, et al. “Conservation And Enhanced Tylophorine Through In Vitro Propagation And Precursor Feeding In Tylophora Indica-An Endangered Medicinal Plant”. International Journal of Pharma and Bio Sciences, vol. 6, no. 4, Dec. 2015, pp. 9-18, https://ijpbs.net/index.php/journal/article/view/4670.