Islam, M. S.; Chowdhury, J. A.; Tania, S. M. Study on the Development of Diltiazem HCl Loaded Colonic Drug Delivery Systems (CDDS) Using Various Polymers and Characterization of Their Release Profiles by <i>In Vitro</I> Dissolution Studies. Dhaka Univ. J. Pharm. Sci 2011, 9, 7-13.