Rummana Aqeel, Muhammad Abubakar, Afsheen Zakir, Besam Babar, Kaswa Nayab, Ahmad Hassan Nadeem, Sajid Naeem. “Effect of Age, Gender and Lip Length on Anterior Teeth Display”. Pakistan Journal of Medical & Health Sciences, vol. 17, no. 10, Jan. 2024, p. 24, doi:10.53350/pjmhs2023171024.