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3. S. N. Afriat: Preference Scales and Expenditure Systems, Econometrica30 (1962), pp. 305–323.
4. S. N. Afriat: The Case of the Vanishing Slutsky Matrix, Journal of Economic Theory5 (1972), pp. 208–223.
5. S. N. Afriat: Revealed Preference Revealed, Waterloo Economic Papers No. 60 (June 1972).