1. Effectiveness and efficiency: random reflections on health services;Cochrane,1972
2. Medicare: a strategy for quality assurance;Lohr,1990
3. The quality of care. How can it be assessed?;Donabedian;JAMA,1988
4. De zorg voor de kwaliteit en de kwaliteit van de zorg [The care for quality and the quality of care];De Maeseneer;Huisarts Wet,1993
5. Examination of context of medicine;van Weel;Lancet,2001