D. J. D. Earn; J. Dushoff; S. A. Levin (2002). "Ecology and Evolution of the Flu". Trends in Ecology and Evolution17 (7): 334–340. doi:10.1016/S0169-5347(02)02502-8.
Nelson, M. I.; Holmes, E. C. (March 2007). "The evolution of pandemic influenza". Nature Reviews Genetics8 (3): 196–205. PMID17262054. doi:10.1038/nrg2053.
Nelson, M. I.; Holmes, E. C. (March 2007). "The evolution of pandemic influenza". Nature Reviews Genetics8 (3): 196–205. PMID17262054. doi:10.1038/nrg2053.