Ermi Girsang, Firdha Muharraran, and Irfan Aulia. “E-Cigarettes and Gingival Pigmentation: A Public Health Concern Among Adolescents”. Archives of The Medicine and Case Reports, Vol. 6, no. 2, Feb. 2025, pp. 1256-69, doi:10.37275/amcr.v6i2.691.