Mishra, P. ., K. S. . Yadav, and G. . Gautam. “Standardization of Roots of Calotropisprocera and Calotropis Gigantean via Evaluation of Morphological and Physicochemical Parameters”. International Journal of Research and Development in Pharmacy & Life Sciences, vol. 6, no. 4, July 2017, pp. 2706 -10, doi:10.21276/IJRDPL.2278-0238.2017.6(4).2706-2710.