1. Priceless: On knowing the price of everything and the value of nothing;Ackerman,2004
2. Adamowicz, W. L., Garrod, G. D., & Willis, K. G. (1995). Estimating the passive use benefits of Britain's inland waterways. Newcastle: Centre for Rural Economy Research Report, University of Newcastle upon Tyne.
3. Can people value the aesthetic and use services of urban sites? Evidence from a survey of Belfast residents;Alberini;Journal of Cultural Economics,2003
4. Alberini, A., Rosato, P., Longo, A., & Zanatta, V. (2004). Information and willingness to pay in a contingent valuation study: The value of the S. Erasmo in the Lagoon of Venice. FEEM working paper series, 19.2004.
5. The transferability of benefit transfer: Contingent valuation of water quality improvements in Costa Rica;Barton;Ecological Economics,2002