Adekoya, N. M., daCosta, O. O. and Utomi, I. L. (2015) “Vertical Lip Thickness and Gingival Display: Comparing the Perception of Dental Professionals and Laypersons in Nigeria”, West African Journal of Orthodontics, 4(1), pp. 19–25. Available at: https://wajo.oauife.edu.ng/index.php/wajo/article/view/33 (Accessed: 16 April 2026).