1. Demand Functions and the Slutsky Matrix;Afriat,1980
2. “The Distance Function and Consumer Behaviour with Applications to Index Numbers and Optimal Taxation”;Deaton;Review of Economic Studies,1979
3. “Optimal Taxes and the Structure of Preferences”;Deaton;Econometrica,1981
4. “The Structure of Utility Functions”;Gorman;Review of Economic Studies,1970
5. Gorman, W M (1970b): “Quasi Separable Preferences, Costs and Technologies”, unpublished.