R. Wenzel, G. Bearman, and M. Edmond. Infection Control and Hospital Epidemiology: The Official Journal of the Society of Hospital Epidemiologists of America, 29 (11):
1012--1018(November 2008)PMID: 18937571.
D. Raphael. Health Promotion Journal of Australia: Official Journal of Australian Association of Health Promotion Professionals, 17 (3):
167--170(December 2006)PMID: 17176228.