1. Acton, J.P., 1976. Evaluating public programs to save lives: the case of heart attacks. RAND Corporation, Santa Monica, Report No. R950RC.
2. Report of the NOAA panel on contingent valuation;Arrow;Federal Register,1993
3. Economic Valuation with States Preference Techniques: A Manual;Bateman,2002
4. Issues arising from the use of qualitative methods in health economics;Coast;Journal of Health Services Research and Policy,2004
5. Synthesising qualitative and quantitative evidence: a review of possible methods;Dixons-Woods;Journal of Health Services Research & Policy,2005