Sobrinho, C. de A. B.; Hatamoto-Zervoudakis, L. K.; Barnabe, V. H.; Nichi, M.; Oliveira, C. A. de. Evaluation of Work Stress Effects on Rottweilers Male dog´S Fertility. Braz. J. Vet. Res. Anim. Sci. 2009, 46, 280-287.