Ligang Qin, Qingfang Xu, Huajia Shan, Guohui Yu, Chunsheng Bai, Yu Zhu and Kun Wang
Journal of Animal and Veterinary Advances 11 ( 17 ): 3111 - 3118 , 2012
Na Risu, Yu Zhu, Han Liying and Zhang Xiaoqing
Journal of Animal and Veterinary Advances 12 ( 8 ): 876 - 881 , 2013