Pathan, H. K., Amit Dasani, and Ajay Saraf. “Stomach Specific Gastro Retentive Drug Delivery System: A Review”. Current Research in Pharmaceutical Sciences 2, no. 3 (October 5, 2012): 118-133. Accessed December 2, 2020. http://crpsonline.com/index.php/crps/article/view/68.