Journal of Animal and Veterinary Advances 5 ( 1 ): 77 - 80 , 2006
Richard M?ller, William P?rez and Rodolfo Ungerfeld
Journal of Animal and Veterinary Advances 4 ( 3 ): 398 - 400 , 2005
Andr?s Rinderknecht, William P?rez, Alejandro Bielli and Richard M?ller
Journal of Animal and Veterinary Advances 4 ( 9 ): 798 - 800 , 2005
Virginia Mosca, William P?rez, Sergio Gigena and Lilian Sierra
Journal of Animal and Veterinary Advances 4 ( 11 ): 913 - 915 , 2005