“Batch and Flow Injection Spectrophotometric Determination of Tetracycline Hydrochloride and Doxycycline Hyclate in Pharmaceutical Preparations”, Iraqi Journal of Science, vol. 56, no. 2A, pp. 909–920, Apr. 2023, Accessed: Jul. 27, 2025. [Online]. Available: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/10176