6Jian Chen,Tao Liu,Cheng-Gang Zhu,Yong-Feng Jin,Yao-Zhou Zhang. Genetic Variation of Chinese PRRSV Strains Based on ORF5 Sequence[J] 2006,Biochemical Genetics(9-10):421~431
7M. P. Murtaugh,M. R. Elam,L. T. Kakach. Comparison of the structural protein coding sequences of the VR-2332 and Lelystad virus strains of the PRRS virus[J] 1995,Archives of Virology(8):1451~1460
8X. -J. Meng,P. S. Paul,P. G. Halbur,M. A. Lum. Phylogenetic analyses of the putative M (ORF 6) and N (ORF 7) genes of porcine reproductive and respiratory syndrome virus (PRRSV): implication for the existence of two genotypes of PRRSV in the U.S.A. and Europe[J] 1995,Archives of Virology(4):745~755