Wankhede, Sonal, Mohini Saxena, and Bhisham Yadav. 2010. “Determination of Triterpenoid Saponins (Quillaja Saponaria Molina) from Roots of Withania Somnifera (L.) Dunal by High Performance Liquid Chromatography”. Asian Journal of Chemistry 23 (2):693-96. https://asianpubs.org/index.php/ajchem/article/view/15822.