S Gasgoos, S. “Apical Root Resorption of Maxillary Anterior Teeth After Orthodontic Treatment of Class II Division 1 Occlusion With Roth Appliance”. Al-Rafidain Dental Journal, vol. 4, no. 2, Aug. 2004, pp. 166-72, doi:10.33899/rden.2004.165165.