//-->
Valuation of tropical rainforsts : philosophical and practical issues in the use of contingent valuation
Carson, Richard T., (1995)
Valuing a global environmental good : US residents' willingness to pay to protect tropical rain forests
Kramer, Randall A., (1997)
Valuation of an Amazonian rainforest
Peters, Charles M., (1997)
Contingent valuation : a user's guide
Carson, Richard T., (1999)
Contingent valuation surveys and tests of insensitivity to scope