1. Poxvirus dilemmas - monkeypox, smallpox;Breman,1998
2. The detection of monkeypox in humans in the Western Hemisphere;Reed,2004
3. Immunity and immunological memory following smallpox vaccination;Amanna,2006
4. A human infection caused by monkeypox virus in Basankusu Territory, Democratic Republic of the Congo;Ladnyj,1972