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.
P. Gastmeier, D. Sohr, C. Geffers, M. Behnke, и H. Rüden. Infection Control and Hospital Epidemiology: The Official Journal of the Society of Hospital Epidemiologists of America, 28 (4):
466--72(апреля 2007)PMID: 17385154.