Vangara, K. K.; Konda, K. K. .; Ravula, S. K.; Vuppala, P. K.; Sripuram, V. K.; Samala, . S. Formulation Development of Metoprolol Succinate Controlled Release Tablets Using Ethyl-Cellulose-Polyvinyl-Pyrrolidone Coating. Scopus Indexed 2015, 8, 2851-2857.