FERNANDO, A. F.; LAPEÑA, J. F. F.; MAGLALANG, G. M. The Black Sombrero: A Helpful Landmark in Axial Imaging Evaluation of the Larynx and Hypopharynx. Philippine Journal of Otolaryngology Head and Neck Surgery, [S. l.], v. 25, n. 2, p. 46–48, 2010. DOI: 10.32412/pjohns.v25i2.637. Disponível em: https://pjohns.pso-hns.org/index.php/pjohns/article/view/637. Acesso em: 4 may. 2024.