SHEIKH, R. E.; GOUDA, A. A.; MAHFOUZ, L. I. SPECTROPHOTOMETRIC DETERMINATION OF OXYBUTININE HYDROCHLORIDE BY ION-PAIR EXTRACTIONIN IN PHARMACEUTICAL PREPARATIONS. International Journal of Pharmacy and Pharmaceutical Sciences, [S. l.], v. 7, n. 6, p. 272–277, 2015. Disponível em: https://journals.innovareacademics.in/index.php/ijpps/article/view/5653. Acesso em: 13 jul. 2024.