R. P. de Souza, N. de Barros, A. J. de O. Paes Junior, O. de S. Tornin, A. Rapoport, and G. G. Cerri, “Value of computed tomography for evaluating the subglottis in laryngeal and hypopharyngeal squamous cell carcinoma”, Sao Paulo Med J, vol. 125, no. 2, pp. 73–76, Mar. 2007.