M.H. Al-Abbasi, Kasim. “Spectrophotometric Determination of Tetracycline by Azo Dye Formation With Diazotised P-Nitroaniline-Application to Pharmaceutical Preparations and Biological Fluids”. Rafidain Journal of Science 20, no. 1 (January 1, 2009): 61–74. Accessed September 29, 2025. https://jamh.uomosul.edu.iq/index.php/rsci/article/view/46983.