Ofi, Walaa A, and Ban A Salih. “Prevalence and Severity of Molar-Incisor Hypomineralisation With Relation to Its Etiological Factors Among School Children 7- 9 Years of Al-Najaf Governorate”. Journal of Baghdad College of Dentistry, vol. 27, no. 3, Sept. 2015, pp. 169-73, https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/825.