Gonçalves, N.N. et al. 2009. Morphological aspects of genital female of the opossum (Didelphis sp.). Brazilian Journal of Veterinary Research and Animal Science. 46, 4 (Aug. 2009), 332–338. DOI:https://doi.org/10.11606/issn.1678-4456.bjvras.2009.26782.