Shchelkunov, S. N. Orthopoxviruses Pathogenic for Humans [electronic resource] / by S. N. Shchelkunov, S. S. Marennikova, R. W. Moyer. - Boston, MA : Springer Science+Business Media, Inc., 2005. - xxiii, 425 p. : ill., maps ; 24 cm. ISBN: 9780387253060 (electronic bk.) 9780387253008 (paper) Subjects--Topical Terms: Orthopoxviruses.Orthopoxviruses.Biomedicine.Immunology.Infectious Diseases.Public Health/Gesundheitswesen.Virology.Epidemiology.Microbiology.