Khan, B., and R. Basu. “Acanthosis Nigricans in Adolescents With Polycystic Ovary Syndrome”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 11, no. 3, Feb. 2022, pp. 765-9, doi:10.18203/2320-1770.ijrcog20220553.