Brito, F.M.M. et al. 2015. Hematology, biochemical profile and thyroid hormones of four species of freshwater stingrays of the genus Potamotrygon. Brazilian Journal of Veterinary Research and Animal Science. 52, 3 (Sep. 2015), 249–256. DOI:https://doi.org/10.11606/issn.1678-4456.v52i3p249-256.