Using of Third and Fourth Order Derivative Spectra to Simultaneous Determination of Olanzapine and Ephedrine in Its Pure and Pharmaceutical Formulations. Ibn AL-Haitham Journal For Pure and Applied Sciences, [S. l.], v. 30, n. 1, p. 366–375, 2017. DOI: 10.30526/30.1.1085. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/1085.. Acesso em: 5 may. 2024.