C. Fijen, E. Kuijper, M. te Bulte, M. Daha, and J. Dankert. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 28 (1):
98--105(January 1999)PMID: 10028078.
D. Whiley, P. Buda, J. Bayliss, L. Cover, J. Bates, and T. Sloots. European Journal of Clinical Microbiology & Infectious Diseases: Official Publication of the European Society of Clinical Microbiology, 23 (9):
705--710(September 2004)PMID: 15248092.