Study on Sequence Variation of Mitochondrial Cytochromeb Gene and Phylogenetic Relationships of Four Native Sheep Breeds　
ZHANG Chuan-sheng;GENG Li-ying;WAN Hai-wei;LI Ji-tao;DU Li-xin
ACTA VETERINARIA ET ZOOTECHNICA SINICA . 2005, (4): 313 -317 .