O. Bilukha, и N. Rosenstein. MMWR. Recommendations and Reports: Morbidity and Mortality Weekly Report. Recommendations and Reports / Centers for Disease Control, 54 (RR-7):
1--21(мая 2005)PMID: 15917737.
M. Breukels, E. van der Zijde, M. van Tol, и G. Rijkers. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 34 (2):
191--7(января 2002)PMID: 11740707.
A. Forsgren, K. Riesbeck, и H. Janson. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 46 (5):
726--731(марта 2008)PMID: 18230042.