1. Changing Health Care in the Netherlands;Ministry of Welfare, Health and Cultural Affairs,1988
2. Competition in Health Care: Reforming the NHS,1990
3. Towards a concept of workable competition;Clark;Am. Econ. Rev.,1940
4. Industrial Market Structure and Economic Performance;Scherer,1990
5. Kontaktorgaan Landelijke Organisaties van Ziektekostenverzekeraars,1989