L. Archibald, M. den Dulk, K. Pallangyo, и L. Reller. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 26 (2):
290--6(февраля 1998)PMID: 9502444.
N. Back, C. Linnemann, J. Staneck, и U. Kotagal. Infection Control and Hospital Epidemiology: The Official Journal of the Society of Hospital Epidemiologists of America, 17 (4):
227--231(апреля 1996)PMID: 8935730.