Evaluation of a Hydrophobic–Hydrophilic (Hydrogenated Castor Oil-Gum Tragacanth) Matrix using Propranolol Hydrochloride as Test Drug. The East and Central African Journal of Pharmaceutical Sciences, [S. l.], v. 10, n. 3, p. 68–71, 2018. Disponível em: http://jsep.uonbi.ac.ke/ojs/index.php/ecajps/article/view/65. Acesso em: 14 jun. 2026.