Jaimini, Rohit, Manish K. Gupta, and Vijay Sharma. “A Review on Formulation and Evaluation of Gastroretentive Floating Tablet of Nifedipin”. Journal of Drug Delivery and Therapeutics 9, no. 4 (July 15, 2019): 651-656. Accessed February 19, 2020. http://jddtonline.info/index.php/jddt/article/view/3065.