Khan, F., Razzak, M. S. M. I., Khan, M. Z. R., Azam, K. R., Sadat, S. M. A., & Reza, M. S. (2008). Preparation and <i>In vitro</i> Evaluation of Theophylline Loaded Gastroretentive Floating Tablets of METHOCEL K4M. Dhaka University Journal of Pharmaceutical Sciences, 7(1), 65–70. https://doi.org/10.3329/dujps.v7i1.1220