1. Aumann, Robert J, Subjectivity and Correlation in Randomized Strategies, Journal of Mathematical Economics v. 1, pp.. 1, 67-96 (1974)
2. Burt CW, LF. McCaig (2006) Staffing, Capacity, and Ambulance Diversion in Emergency Departments: United States, 200304, Advance Data from Vital and Health Statistics no. 376 (27 September). http://www.cdc.gov/nchs/data/ad/ad376.pdf .
3. Burt, C.W, L.F. McCaig, and E.A. Rechsteiner (2004) Ambulatory Medical Care Utilization Estimates for 2004, http://www.cdc.gov/nchs/products/pubs/pubd/hestats/estimates2004/estimates04.htm (accessed 23 February 2007).
4. Cunningham P, May J. (2003) Insured Americans Drive Surge in Emergency Department Visits. Issue Brief no. 70 (Washington: Center for Studying Health System Change, 2003). http://www.hschange.com/CONTENT/613/ .
5. Derlet RW, JR. Richards, Overcrowding in the nations emergency departments: complex causes and disturbing effects. Ann Emerg Med 35, 63-68 (2000)