Alkhatib, H., A. Barqawi, and E. Alhawmdeh. “Effect of Casein Incorporation on the Release of Diltiazem HCl from Hypromellose-Based Matrix Tablets”. Jordan Journal of Pharmaceutical Sciences, vol. 11, no. 2, May 2018, https://archives.ju.edu.jo/index.php/jjps/article/view/15320.