C. Geffers, D. Sohr, and P. Gastmeier. Infection Control and Hospital Epidemiology: The Official Journal of the Society of Hospital Epidemiologists of America, 29 (12):
1167--1170(December 2008)PMID: 19014317.
M. Dworkin, L. Park, and S. Borchardt. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 44 (6):
810--6(March 2007)PMID: 17304452.
L. Hanna, N. Girgis, A. el Ella, and Z. Farid. Metabolic, Pediatric, and Systemic Ophthalmology (New York, N.Y.: 1985), 11 (4):
160--162(1988)PMID: 3221799.