Anjaneyulu, M., K. Rao, A. Parandhama, and M. Subha. “INTERPENETRATING POLYMER NETWORK MICROSPHERES OF POLY (VINYL ALCOHOL)/XANTHAN GUM FOR CONTROL RELEASE OF VERAPAMIL HYDROCHLORIDE”. Journal of Advanced Scientific Research, Vol. 11, no. 01, Feb. 2020, pp. 109-15, https://sciensage.info/index.php/JASR/article/view/417.