1. History of AIDS: emergence and origin of a modern pandemic;Grmek,1990
2. Smallpox and its eradication;Fenner,1988
3. Control of communicable disease manual,2008
4. The weight of evidence and the burden of authority: case histories, medical statistics and smallpox inoculation;Rusnock;Clio Med,1995
5. The dynamics of smallpox epidemics in Britain, 1550–1800;Duncan;Demography,1993