Ahmed, S. K. A., S. S. Ullah, K. Bhuyan, M. K. Deka, and S. A. Sheikh. “Spectrum of Pigmented Lesions of Skin: A Retrospective Study in a Tertiary Health Care of Southern Assam”. International Journal of Research in Medical Sciences, vol. 9, no. 4, Mar. 2021, pp. 1117-21, doi:10.18203/2320-6012.ijrms20211361.