Suhad Abdel Moneim Yassin, and Khalaf F Al-Samarrai. 2019. “Ratio Spectrum Derivative Quantitative Analysis of Propranolol and Diazipam in Combind Pharmaceutical Mixtures”. International Journal of Research in Pharmaceutical Sciences 10 (4):3657-64. https://ijrps.com/home/article/view/3224.