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3. Antigenic and genetic characteristics of swine-origin 2009 A(H1N1) influenza viruses circulating in humans;Garten;Science,2009
4. The World Health Organisation Influenza A (H1N1) update 24 (10/05/09) http://www.who.int/csr/don/2009_05_10/en/index.html
5. The Australian Government - Department of Health and Aging H1N1 Influenza 09 (Human Swine Influenza) Outbreak http://www.healthemergency.gov.au/internet/healthemergency/publishing.nsf/Content/news-012