1. Berkhout, P., Oldenboom, E., Velthuijsen, J.W., Wijffels, A., 1997. Waterrecreatie. Studie over de WSV-doelgroep Waterrecreatie. RIZA rapport 97.028, Rijksinstituut voor Integraal Zoetwaterbeheer en Afvalwaterbehandeling (RIZA), Lelystad, the Netherlands.
2. Public attitudes to contingent valuation and public consultation;Brouwer;Environmental Values,1999
3. A meta-analysis of wetland contingent valuation studies;Brouwer;Regional Environmental Change,1999
4. Social impact assessment;Burdge,1995
5. A conceptual approach to social impact assessment: Collection of readings;Burdge,1994