Canola, J.C. and Borges, N.C. 2005. Tracheal compression as auxiliary method in the radiologic diagnosis of the cervical tracheal collapse. Brazilian Journal of Veterinary Research and Animal Science. 42, 6 (Dec. 2005), 414–418. DOI:https://doi.org/10.11606/issn.1678-4456.bjvras.2005.26399.