“Preparation and Dissolution Characteristics of Sustained Release Diltiazem Hydrochloride Tablets”, East Cent. Afr. J. Pharm. Sci., vol. 9, no. 2, pp. 40–45, Nov. 2018, Accessed: Jul. 03, 2026. [Online]. Available: http://jsep.uonbi.ac.ke/ojs/index.php/ecajps/article/view/42