Karthikeyan Murthykumar, Sankari Malaiappan, and Gurumoorthy Kaarthikeyan, “ASSOCIATION OF SKIN COLOR AND GINGIVAL HYPERPIGMENTATION AMONG SOUTH INDIAN POPULATIONRETROSPECTIVE STUDY”, J Arch.Egyptol, vol. 17, no. 7, pp. 3244–3256, Nov. 2020.