Lima CR de O, Rabelo RE, Vulcani VAS, et al. Morphological patterns and malignancy criteria of transmissible venereal tumor in cytopathological and histopathological exams. Braz. J. Vet. Res. Anim. Sci. 2013;50(3):238-246. doi:10.11606/issn.1678-4456.v50i3p238-246