1. Smallpox and its eradication;Fenner,1988
2. Sequencing the smallpox virus genome—prelude to destruction of a virus species;Mahy;ASM News,1991
3. Post-smallpox eradication policies;Who;Wkly Epidemiol Rec,1992
4. Smallpox and biological warfare;Capps;Am J Publ Health,1986
5. What should be done about smallpox virus?;Dumbell;Lancet,1987