1. "Infectious Diseases of Humans: Dynamics and Control,";R. M. Anderson;Oxford Science Publications,1992
2. Duration of immunity after smallpox vaccination: A study on vaccination policy against smallpox bioterrorism in Japan,;I. Arita;Japan Journal of Infectious Diseases,2002
3. If smallpox strikes Portland,;C. L. Barrett;Scientific American,2005
4. Like-with-like preference and sexual mixing models,;S. P. Blythe;Mathematical Biosciences,1989
5. A model for a smallpox vaccination policy,;S. A. Bozzette;The New England Journal of Medicine,2003