4Bayliss C D,Spies U,Shaw K,et al.A Comparison of these quences of segment A of four infectious bursal disease virus strains and identification of avariable region VP2[J].J General Virol,1990,71:1303-1312.
5Ki benge F S B,Jack wood D J,Mercado C C.Nucleotidese quence analysis of genome segment A of infectious bursal disease Virus[J].J Gen Virol,1990,71:569-577.
6Eterradossi N,Arnauld C,Toquin D,et al.Critcal aminoa changesin VP2.variabled omain areas sociated with typical latypical antigenicity in very virulent Infectious bursal diseviruses[J].Arch Virol,1998,143:1627-1636.
