1. Financing Health Care With Particular Reference to Medicines. Vol 1: Summary and Overview. London: National Economic Research Associates; 1993 Apr. pp 6–7
2. O'Leary Morgan K, Morgan S, Quitno N, editors. Health Care State Rankings 1996: Health Care in the 50 United States. 4th ed. Lawrence (KS): Morgan Quitno Press; 1996. p 230
3. Bundesvereinigung Kassenarzfliche. Grunddaten zur kassenarztlichen Versorgung in der Bundesrepublik Deutschland 1995. (a) Table G 5; (b) Figure G 17; (c) Figure G 3; (d) Figure G 6; (e) Figure A 1; (f) Figure A 4; (g) Figure H 3; (h) Figure D 2
4. Health care systems in twenty-four countries;Schieber;Health Aff (Millwood),1991
5. Entwurf eines GKV-Weiterentwicklungsgesetzes-GKVWGBundestagsdrucksache 13/3608, Deutscher Bundestag, 13. Wahlperiode; 1996 Jan 30