“Spectrophotometric Determination of Nirite By The Diazotization Coupling With Aniline and 4,6 Dihydroxy-2 Mercaptopyrimidine”. Ibn AL-Haitham Journal For Pure and Applied Sciences, vol. 21, no. 2, Sept. 2017, pp. 102-109E, https://jih.uobaghdad.edu.iq/index.php/j/article/view/1391.