Senthilnathan, S., Baskaran, M., Thirumalai, S., & Naarayanen, M. (1970). A Comparative Study to evaluate Gingival Depigmentation using Scalpel Blade Technique and CO2 Lasers. Journal of Orofacial Research, 4(1), 59-62. https://mansapublishers.com/jofr/article/view/1981