N. WADIA, D.; T. DESAI, H. ULTRA PERFORMANCE LIQUID CHROMATOGRAPHY (UPLC) METHOD DEVELOPMENT AND VALIDATION FOR THE SIMULTANEOUS ESTIMATION OF ETOPHYLLINE AND THEOPHYLLINE IN PHARMACEUTICAL DOSAGE FORM: Pharmaceutical Science-Analytical Chemistry. International Journal of Life Science and Pharma Research, [S. l.], v. 2, n. 3, p. P19-P24, 2012. Disponível em: https://www.ijlpr.com/index.php/journal/article/view/245. Acesso em: 1 feb. 2026.