1. E.C. Directive 2000/60/EC establishing a framework for Community Action in the field of water policy (OJ/L327/22.12.2000, European Water Framework Directive, WFD), 2000.
2. Evaluation in environmental planning. Assessing environmental, social, economic and political trade offs;McAllister,1995
3. Cost-benefit analysis;Boardman,2001
4. Economic analysis of environmental impacts;Dixon,1997