جهاد أحمد ش. “Spectrophotometric Micro Determination of Ceric Ion Using 2, 6 – Diamino Toluene”. College of Basic Education Research Journal, vol. 8, no. 4, Dec. 2009, pp. 447-5, https://stats.uomosul.edu.iq/index.php/berj/article/view/39892.