Anisah, Siti Umi, Asri Darmawati, and Amirudin Prawita. “Validation of UV Spectrophotometry Method for Determination of Lopinavir and Ritonavir Simultaneously”. Berkala Ilmiah Kimia Farmasi 8, no. 2 (November 29, 2021): 48–54. Accessed February 6, 2025. https://e-journal.unair.ac.id/BIKFAR/article/view/31760.