B. Poornima, P. Jayachandra Reddy, and D.S.S.N. Neelima. “Method Development and Validation for the Simultaneous Determination of Ritonavir and Lopinavir by RP-HPLC and by UV- Spectrophotometry”. International Journal of Pharmacy and Analytical Research 8, no. 2 (September 12, 2022): 227–240. Accessed February 11, 2026. https://ijpar.com/ijpar/article/view/186.