Carvalho, Heloisa de Andrade, Viviane Figueiredo, Wilson Leite Pedreira Jr., and Salim Aisen. 2005. “ High Dose-Rate Brachytherapy As a Treatment Option in Primary Tracheal Tumors ”. Clinics 60 (4): 299-304. https://doi.org/10.1590/S1807-59322005000400007.