1. Schieber GJ, Poullier JP, Greenwald LM. Health spending, delivery, and outcomes in OECD countries. Health Affaires 1993: 120–3-.
2. Financing and delivering health care. A compartive analysis of OECD countries,1987
3. Barr N, Glennerster H, Le Grand J. Reform and the National Health Service. Welfare State Programme Discussion Paper WSP/32, 1988.
4. The role of medicine: dream, mirage or nemesis;McKeown,1986
5. On the need for outcomes reserach and the prospects for the evaluative clinical sciences;Wennberg,1990