Sobrinho, C. de A.B. et al. 2009. Evaluation of work stress effects on Rottweilers male dog´s fertility. Brazilian Journal of Veterinary Research and Animal Science. 46, 4 (Aug. 2009), 280–287. DOI:https://doi.org/10.11606/issn.1678-4456.bjvras.2009.26776.