1. Debreu, G. (1960). Topological methods in cardinal group utility theory, inMathematical Models in the Social Sciences. Stanford University Press, Stanford, California.
2. Dugas, R. (1955).A History of Mechanics. Central Book Company, New York.
3. Goldstein, H. (1950).Classical Mechanics. Addison-Wesley, Reading, Massachusetts.
4. Koopmans, T. C. (1960). Stationary ordinal utility and impatience,Econometrica,28. 2 (April 1960).
5. Krantz, D., Luce, R. D., Suppes, P., and Tversky, A. (1971).The Foundations of Measurement. Academic Press, New York.