1. Suarez DL: Influenza A virus. Avian Influenza. Edited by: Swayne DE. 2008, Ames, Iowa, USA: Blackweel Publishing, 3-22.
2. Alexander DJ, Senne DA: Newcastle disease. Diseases of Poultry. 12th edition. Edited by: Saif YM, Glisson JR, McDougald LR, Nolan LK, Swayne DE. 2008, Ames, Iowa, USA: Blackwell Publishing, 75-100.
3. OIE: Avian influenza. Manual for Diagnostic Tests and Vaccines for Terrestrial Animals. 2012, chapter 234 http://www.oie.int/international-standard-setting/terrestrial-manual/access-online/
4. Swayne DE, Halvorson DA: Influenza. Diseases of Poultry. 12th edition. Edited by: Saif YM, Glisson JR, McDougald LR, Nolan LK, Swayne DE. 2008, Ames, Iowa, USA: Blackwell Publishing, 153-184.
5. Halvorson DA: Control of low pathogenicity avian influenza. Avian influenza. Edited by: Swayne DE. 2008, Ames IO: Blackwell Publishing, 513-536.