ANALYTICAL METHODS DEVELOPMENT & VALIDATION FOR SIMULTANEOUS ESTIMATION OF LOPINAVIR & RITONAVIR IN PHARMACEUTICAL FORMULATION BY SIMULTANEOUS EQUATION METHOD USING UV SPECTROPHOTOMETRY. Int. Res. J. Pharm. 2018;9(8):114-119. Accessed May 31, 2026. https://irjponline.org/index.php/irjp/article/view/1549