M, Sunitha Reddy, Vinay Kumar Chakravarthy M, Shekar Bijjika, and Sudheer Rao P. 2017. “Approaches to Gastro Retentive Drug Delivery Systems: An Overview”. International Journal of Research in Phytochemistry and Pharmacology 7 (3), 50-63. https://scienztech.org/index.php/ijrpp/article/view/911.