S. Shehab, N. Keller, A. Barkay, L. Leitner, A. Leventhal, and C. Block. European Journal of Clinical Microbiology & Infectious Diseases: Official Publication of the European Society of Clinical Microbiology, 17 (11):
749--53(November 1998)PMID: 9923513.
F. Fusco, and V. Puro. Euro Surveillance: Bulletin Européen Sur Les Maladies Transmissibles = European Communicable Disease Bulletin, (March 2008)PMID: 18445438.
W. Hautmann, I. Harms, U. Vogel, A. Zirngibl, and M. Wildner. Gesundheitswesen (Bundesverband Der Ärzte Des Öffentlichen Gesundheitsdienstes (Germany)), 67 (12):
853--857(December 2005)PMID: 16379047.