X.F. Han, Z.Y. Niu, F.Z. Liu and C.S. Yang
International Journal of Poultry Science 4 ( 4 ): 197 - 201 , 2005
C.L. Zhang, Z.Y. Niu, S.S. Hou, F.Z. Liu, W. Huang and M. Xie
International Journal of Poultry Science 4 ( 4 ): 202 - 205 , 2005