E. I., AKPABIO, EFFIONG D. E., UWAH T. O., and SUNDAY N. I. 2020. “FORMULATION AND IN-VITRO EVALUATION OF THEOPHYLLINE HYDROCHLORIDE EFFERVESCENT FLOATING TABLETS: EFFECT OF POLYMER CONCENTRATION ON TABLET BUOYANCY”. International Journal of Pharmacy and Pharmaceutical Sciences 12 (1):59-65. https://doi.org/10.22159/ijpps.2020v12i1.35055.