“Spectrophotometric Determination of Paracetamol, Ibuprofen, and Caffeine in Novafen Capsules by Vierordt’s Method and Crammer’s Rule for Dissolving the Trinomial Equations”. Samarra Journal of Pure and Applied Science 4, no. 1 (March 31, 2022): 33–42. Accessed April 16, 2026. https://sjpas.com/index.php/sjpas/article/view/346.