Iwatsuki-Horimoto, Kanazawa, Sugii et al.: "The index influenza A virus subtype H5N1 isolated from a human in 1997 differs in its receptor-binding properties from a virulent avian influenza virus." in: The Journal of general virology, Vol. 85, Issue Pt 4, pp. 1001-5, 2004 (PubMed).
Thompson, Shay, Weintraub et al.: "Mortality associated with influenza and respiratory syncytial virus in the United States." in: JAMA, Vol. 289, Issue 2, pp. 179-86, 2003 (PubMed).
Alexander: "A review of avian influenza in different bird species." in: Veterinary microbiology, Vol. 74, Issue 1-2, pp. 3-13, 2000 (PubMed).
Buxton Bridges, Katz, Seto et al.: "Risk of influenza A (H5N1) infection among health care workers exposed to patients with influenza A (H5N1), Hong Kong." in: The Journal of infectious diseases, Vol. 181, Issue 1, pp. 344-8, 2000 (PubMed).
Shortridge, Zhou, Guan et al.: "Characterization of avian H5N1 influenza viruses from poultry in Hong Kong." in: Virology, Vol. 252, Issue 2, pp. 331-42, 1999 (PubMed).