1. Environmental preservation, uncertainty and irreversibility;Arrow;Quarterly Journal of Economics,1974
2. Monetary Valuation of Environmental Goods. Alternatives to Contingent Valuation;Baarsma,2000
3. Economic Valuation with Stated Preference Techniques: A Manual;Bateman,2002
4. Option value: an exposition and extension;Bishop;Land Economics,1982
5. Development of a survey instrument to measure subjective valuations of non-use benefits of local public transport services;Bonsall,1992