1. Aldrich, T.E., Wilson, C.C., and Easterly, C.E. (1985). "Population surveillance for rare health events." In: Proceedings of the 1985 Public Health Conference on Records and Statistics. Department of Health and Human Services Pub. No. (PHS) 86-2114 U.S. Government Printing Office, Washington, DC. pp. 215-220.
2. Maps Based on Probabilities