Formulation of Gastroretentive Microballoons of Metoprolol Succinate Using Acetylated Cocoyam (Xanthosoma sagittifolium) Starch as a Sustained Release Polymer. The East and Central African Journal of Pharmaceutical Sciences, [S. l.], v. 25, n. 1, p. 17–30, 2023. Disponível em: http://jsep.uonbi.ac.ke/ojs/index.php/ecajps/article/view/1455. Acesso em: 14 jun. 2026.