Al Ahmed، M.، و Wong، F. (1998). A Retrospective Study to Investigate the Factors Affecting the Closure Time Open Apices in Traumatised Non-Vital Immature Permanent Central Incisor Teeth (رسالة ماجستير غير منشورة). University of London، لندن. مسترجع من http://search.mandumah.com/Record/604810
Al Ahmed، Mohammed، و Ferranti Wong. "A Retrospective Study to Investigate the Factors Affecting the Closure Time Open Apices in Traumatised Non-Vital Immature Permanent Central Incisor Teeth" رسالة ماجستير. University of London، لندن، 1998. مسترجع من http://search.mandumah.com/Record/604810