3Rikula U,Pankala L,Jalkanen L,et al.Distemper vaccination of farmed fur animals in Finland[J].Prev Vet Med,2001,49(1):125-133.
4Martella V,Cirone F,Elia G,et al.Heterogeneity within the hemagglutinin genes of canine distemper virus (CDV) strains detected in Italy[J].Vet Microbiol,2006,116:301-309.