1. Poxviridae: the viruses and their replication;Moss,2006
2. Poxviruses;Damon,2006
3. The confirmation and maintenance of smallpox eradication;Breman;N Engl J Med,1980
4. Molluscum contagiosum virus;Bugert,2008
5. Smallpox and its eradication;Fenner,1988