Sheikh, R. E., Gouda, A. A., & Mahfouz, L. I. (2015). SPECTROPHOTOMETRIC DETERMINATION OF OXYBUTININE HYDROCHLORIDE BY ION-PAIR EXTRACTIONIN IN PHARMACEUTICAL PREPARATIONS. International Journal of Pharmacy and Pharmaceutical Sciences, 7(6), 272–277. Retrieved from https://journals.innovareacademics.in/index.php/ijpps/article/view/5653