Chukka, S., and S. Shaik. “DEVELOPMENT AND CHARACTERIZATION OF GASTRORETENTIVE DRUG DELIVERY SYSTEM FOR RITONAVIR TABLETS USING NATURAL POLYMERS”. Asian Journal of Pharmaceutical and Clinical Research, vol. 10, no. 5, May 2017, pp. 318-22, doi:10.22159/ajpcr.2017.v10i5.17266.