FORMULATION AND CHARACTERIZATION OF MATRIX AND TRIPLE-LAYER MATRIX TABLETS FOR CONTROLLED DELIVERY OF METOPROLOL TARTRATE. International Journal of Pharmaceutical Sciences and Drug Research, [S. l.], v. 3, n. 1, p. 23–28, 2011. DOI: 10.25004/IJPSDR.2011.030105. Disponível em: https://ijpsdronline.com/index.php/journal/article/view/117.. Acesso em: 17 oct. 2025.