G.H. Zhao, W. Cheng, P.J. Zhang, Y.S. Han and D.K. Chen
Journal of Animal and Veterinary Advances 9 ( 24 ): 3083 - 3091 , 2010
C.Y. Wu, G.H. Zhao, Y.Q. Zhao, H. Liu, P.J. Zhang and D.K. Chen
Journal of Animal and Veterinary Advances 10 ( 5 ): 642 - 650 , 2011