FORMULATION AND EVALUATION OF RANITIDINE LOADED CHITOSAN MICROSPHERES. International Research Journal of Pharmacy, [S. l.], v. 6, n. 9, p. 80–86, 2015. Disponível em: https://irjponline.org/index.php/irjp/article/view/1198. Acesso em: 31 oct. 2026.