1. D. Cavanagh and P.J. Davis, Coronavirus IBV: Virus retaining spike glycopolypeptide S2 but not S1 is unable to induce virus-neutralizing or haemagglutination-inhibiting antibody, or induce chicken tracheal protection, J. Gen. Virol. 67: 1435–1442 (1986).
2. D.F. Stern, L. Burgess, and B.M. Sefton, Structural analysis of virion proteins of the Avian Infectious Bronchitis Virus, J. Virology 42: 208–219 (1982).
3. D. Cavanagh, Coronavirus IBV: structural characterization of the spike protein, J. Gen. Virol. 64: 2577–2583 (1983).
4. D.F. Stern and B.M. Sefton, Coronavirus proteins: Structure and function of the oligosaccharides of the Avian Infectious Bronchitis Virus glycoproteins, J. Virology 42: 804–812 (1982).
5. G. Koch, L. Hartog, A. Kant, D. van Roozelaar, and G.F. de Boer, Differentiation of IBV variant strains employing monoclonal antibodies, Isr. J. Vet. Med. 42: 89–97 (1986).