PACHUAU, L.; SARKAR, S.; MAZUMDER, B. Formulation and evaluation of matrix microspheres for simultaneous delivery of salbutamol sulphate and theophylline. Tropical Journal of Pharmaceutical Research, [S. l.], v. 7, n. 2, p. 995–1002, 2008. DOI: 10.4314/tjpr.v7i2.14684. Disponível em: https://www.ajol.info/index.php/tjpr/article/view/14684. Acesso em: 14 oct. 2026.