1. 1. World Organization for Animal Health (OIE). (2012) Newcastle disease (Infection with Newcastle disease virus). Man. Diagn. Tests Vaccines Terr. Anim. (Mammals, Birds Bees), 1: 555-574.
2. 2. King, A., Lefkowitz, E., Adams, M.I. and Carstens, E.B. (2012) Virus Taxonomy: 9th Report of the International Committee on Taxonomy of Viruses. Academic Press, London, United Kingdom.
3. Persistent antigenic variation of influenza A viruses after incomplete neutralization in ovo with heterologous immune serum.;Archetti;J Exp Med,1950
4. 4. Alexander, D.J. (2003) Paramyxoviridae. Iowa State University Press, Iowa.
5. Evidence for a new avian Paramyxovirus serotype 10 detected in rockhopper penguins from the Falkland Islands.;Miller;J Virol,2010