4Bienabe E, Hearne R tL Public preferences for biodiversi- ty conservation and scenic beauty within a framework of environmental services payments. Forest Policy and Eco- nomics, 2006, (9):335-348.
5Moran D, McVittie A, Allcroft D J, et al. Quantifying public preferences for agri-environmental policy in Scot- land.- a comparison of methods. Ecological Economics, 2007, 63 (1): 42-53.