Lima, Caroline Rocha de Oliveira, et al. “Morphological Patterns and Malignancy Criteria of Transmissible Venereal Tumor in Cytopathological and Histopathological Exams”. Brazilian Journal of Veterinary Research and Animal Science, vol. 50, no. 3, June 2013, pp. 238-46, https://doi.org/10.11606/issn.1678-4456.v50i3p238-246.