ANJANEYULU, M.; RAO, K.; PARANDHAMA, A.; SUBHA, M. INTERPENETRATING POLYMER NETWORK MICROSPHERES OF POLY (VINYL ALCOHOL)/XANTHAN GUM FOR CONTROL RELEASE OF VERAPAMIL HYDROCHLORIDE. Journal of Advanced Scientific Research, v. 11, n. 01, p. 109-115, 10 fev. 2020.