Tirtamulia, K., A. Umboh, S. Warouw, V. Pateda, and F. Regina. “Acanthosis Nigricans and Insulin Resistance in Obese Children”. Paediatrica Indonesiana, Vol. 50, no. 5, Oct. 2010, pp. 274-7, doi:10.14238/pi50.5.2010.274-7.