“Spectrophotometric Determination of Diazepam and Propranolol Hydrochloride in Pharmaceutical by Dual Wavelengths Method”. Samarra Journal of Pure and Applied Science 2, no. 2 (September 22, 2021): 11–18. Accessed April 16, 2026. https://www.sjpas.com/index.php/sjpas/article/view/108.