S. Alvarez, M. Fresno, N. Darmanin, H. R. Briggs, P. M�ndez and N. Castro
Journal of Animal and Veterinary Advances 6 ( 1 ): 94 - 98 , 2007
S. Alvarez, P. Mendez, C. Diaz, H. Briggs and M. Fresno
Journal of Animal and Veterinary Advances 7 ( 3 ): 359 - 363 , 2008