J. Khayamali, R. Khadka, S. Lamichhane, and A. H. Rijal, “Prevalence of Gingival Pigmentation and its Association with Age, Gender and Gingival Biotype in a Tertiary Care Hospital in Nepal”, J Nepal Health Res Counc, vol. 23, no. 01, pp. 126-131, Jun. 2025.