J.L. Guo, Q.H. Zheng, Q.Q. YIN, W. Cheng and Y.B. Jiang
American Journal of Animal and Veterinary Sciences 2 ( 3 ): 62 - 65 , 2007
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