Garofalo, L., A. Biscozzi, V. Mastrandrea, and E. Bonifazi. “Acanthosis Nigricans Vulgaris. A Marker of Hyperinsulinemia.”. European Journal of Pediatric Dermatology, vol. 13, no. 2, June 2003, pp. 85-8, https://ejpd.com/index.php/journal/article/view/245.