C. Peña, M. Dominguez, M. Pujol, R. Verdaguer, F. Gudiol, и J. Ariza. Clinical Microbiology and Infection: The Official Publication of the European Society of Clinical Microbiology and Infectious Diseases, 9 (9):
938--43(сентября 2003)PMID: 14616682.
C. Walker, и H. Wiesenfeld. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, (апреля 2007)PMID: 17342664.
F. Allerberger, и H. Mittermayer. Clinical Microbiology and Infection: The Official Publication of the European Society of Clinical Microbiology and Infectious Diseases, 14 (3):
197--199(марта 2008)PMID: 18190577.