1. Afifi AA, Azen SP (1979) Statistical analysis. A computer oriented approach. 2nd edn. New York San Francisco London
2. Ament RP, Dreachslin JL, Kobrinski EK, Wood RW (1982) Three case-type classifications: suitability for use in reimbursing hospitals. MC 20/5:460ff.
3. Anderson GF, Steinberg EP (1984) Hospital readmissions in the medicare population. N Engl J Med311/21:1349ff.
4. Arnett III, RH, Cocotas C, Freeland M, Kowalczyk G (1984) A framework for analyzing prospective payment system rate increase factors. Health Care Finan Rev 6/4:135ff.
5. Barer ML (1982) Case mix adjustment in hospital cost analysis: information theory revisited. J Health Eco 1/1:53ff.