A. H. Hamed, “Simple Method f or Spectrophotometric Determination o f Benzidine i n Aqueous Solutions b y Coupling w ith Β - Naphthol”, Al-Nahrain J. Sci., vol. 14, no. 2, pp. 43–50, Jul. 2018, Accessed: May 22, 2026. [Online]. Available: https://anjs.edu.iq/index.php/anjs/article/view/879