El-menshawe, S. F.; Kharshoum, R. M.; Hamad, D. S.; Halawa, A. EFFECT OF BIODEGRADABLE CO-POLYMERS AND DIVALENT CATIONS ON THE SUSTAINED RELEASE ABILITY OF PROPRANOLOL HYDROCHLORIDE LOADED BIOMATERIAL MICROSPHERES. Int J Pharm Pharm Sci 2016, 8, 311-317.