1. Aiking, H., Govers, H.A.J., Keulen, R.W., Hermens, P.A.H., and Jeltes, R.: 1989, ?A general approach to environmental health impact assessment in The Netherlands?, in D.D. Hemphill (ed.), Trace Substances in Environmental Health ? XXII. University of Missouri, pp. 98?108.
2. Beinat, E.: 1992, ?An Interactive Procedure to Assess Value Functions for Environmental Quality. Institute for Environmental Studies, Free University, Amsterdam.
3. Bogetoft, P. and Pruzan, P.: 1991, Planning with Multiple Criteria. Amsterdam: North-Holland.
4. Brown, R.M., McClelland, N.I., Deininger, R.A., O'Connor, M.F.: 1972, ?A water quality index: crashing the psychological barrier?, in W. Thomson (ed.), Indicators of Environmental Quality. New York: Plenum Press, pp. 173?182.
5. Fishburn, P.C.: 1967, ?Methods of estimating additive values?, Management Science 13, 435?453.