JAHFAR, M., ABDUL RAHIM, A., JINCY, A., & UNNIKRISHNAN, K. (2010). Assay of Steroidal Sapogenin in Costus Speciosus Rhizomes. Asian Journal of Chemistry, 20(2), 1382–1388. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/12551