1. Confidence intervals to bound the value of time;Armstrong;Transp. Res.,2001
2. Report of the NOAA Panel on Contingent Valuation;Arrow,1993
3. Development and Design of a Contingent Value Survey for Measuring the Public's Value for Visibility Improvements at the Grand Canyon National Park;Balson,1990
4. Designing stated choice experiments: state of the art;Bliemer,2006
5. Methods Development for Assessing Tradeoffs in Environmental Management;Brookshire,1979