N. WADIA, D. and T. DESAI, H. 2012. 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. 2, 3 (Sep. 2012), P19-P24.