Viau, P. et al. 2005. Fecal steroid and quantification in captive jaguars (Panthera onca): validation of a method. Brazilian Journal of Veterinary Research and Animal Science. 42, 4 (Aug. 2005), 262–270. DOI:https://doi.org/10.11606/issn.1678-4456.bjvras.2005.26420.