B. YILMAZ. “Determination of Metoprolol in Pharmaceutical Preparations by Zero, First, Second and Third Order Derivative Spectrophotometric Method”. International Journal of Pharma and Bio Sciences 1, no. 1 (March 31, 2010): 1–15. Accessed July 23, 2026. https://ijpbs.net/index.php/journal/article/view/159.