The genome segment B encoding the RNA-dependent RNA polymerase protein VP1 of very virulent infectious bursal disease virus (IBDV) is phylogenetically distinct from that of all other IBDV strainsISLAM, M. R; ZIERENBERG, K; MÜLLER, H et al.Archives of virology. 2001, Vol 146, Num 12, pp 2481-2492, issn 0304-8608Article

The VP2 variable region of African and German isolates of infectious bursal disease virus : comparison with very virulent, classical virulent, and attenuated tissue culture-adapted strainsZIERENBERG, K; NIEPER, H; VAN DEN BERG, T. P et al.Archives of virology. 2000, Vol 145, Num 1, pp 113-125, issn 0304-8608Article