SHAH, B. K. Black tongue. Journal of Advances in Internal Medicine, [S. l.], v. 3, n. 1, p. 27, 2014. DOI: 10.3126/jaim.v3i1.10699. Disponível em: https://www.nepjol.info/index.php/JAIM/article/view/10699. Acesso em: 31 jul. 2021.