1. Alexander D (2003) Paramyxoviridae, 11th ed. Iowa State University Press, Ames, IA.
2. Lamb R, Parks G (2007) Paramyxoviridae: the viruses and their replication, p 1449–1496. In Knipe DM, Howley PM, Griffin DE, Lamb RA, Martin MA, Roizman B, Straus SE (ed), Fields virology, 5th ed. Lippincott Williams & Wilkins, Philadelphia, PA.
3. Rescue of Newcastle disease virus from cloned cDNA: evidence that cleavability of the fusion protein is a major determinant for virulence. J. Virol;BP Peeters,1999
4. Role of fusion protein cleavage site in the virulence of Newcastle disease virus. Microb. Pathog;A Panda,2004
5. Deduced amino acid sequences at the fusion protein cleavage site of Newcastle disease viruses showing variation in antigenicity and pathogenicity. Arch. Virol;MS Collins,1993