A. . S. Al-Ubaydi and N. M. J. Al- Mothaffar, “Evaluation of Andrews’ six keys of normal occlusion in a sample of Iraqi adults in Baghdad city”, J Bagh Coll Dent, vol. 25, no. 2, pp. 130–139, Jun. 2013, Accessed: Jul. 16, 2025. [Online]. Available: https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/241