Rahaf Safadi, Reef Al-Safadi , Riham Al-Safadi , Ebtisam Al-Ghamdi , Hiyam AlMozayen , Shahad Al-Farraj , Wafa Binsaleh , Yara Al-Mutawa , Ghadah Al-Dossari. “Prevalence of First Permanent Molar Loss in a Population of Saudi Adolescents and Young Adults”. International Journal of Emerging Trends in Science and Technology, Vol. 5, no. 04, Apr. 2018, pp. 6577-84, https://igmpublication.org/ijetst.in/index.php/ijetst/article/view/1257.