1. The case of the vanishing slutsky matrix;Afriat;J. Econom. Theory,1972
2. Representation of a preference ordering by a numerical function;Debreu,1954
3. Smooth preferences;Debreu;Econometrica,1972
4. Ordinary Differential Equations;Hartman,1997
5. Measuring utility from demand;Hosoya;J. Math. Econom.,2013