Rijal, Arjun Hari, Bhageshwar Dhami, Nashib Pandey, and Deepa Aryal. “Prevalence of Gingival Pigmentation and Its Association With Gingival Biotype and Skin Colour”. Journal of Nepalese Society of Periodontology and Oral Implantology 5, no. 1 (July 1, 2021): 19–25. Accessed April 27, 2024. https://www.nepjol.info/index.php/jnspoi/article/view/38178.