1. Almost everywhere existence of the second differential of a convex function and some properties of convex surfaces connected with it;Alexandroff;Leningrad State University Annals, Mathematics Series,1939
2. Existence of an equilibrium for a competitive economy;Arrow;Econometrica,1954
3. Quasi-concave programming;Arrow;Econometrica,1961
4. Pollak and Wachter on the household production function approach;Barnett;Journal of Political Economy,1977
5. Consumer theory;Barten,1982