1. K.J. Arrow and L. Hurwicz, “Reduction of constrained maxima to saddle-point problems”, in: 3rd Berkeley Symposium on Mathematical Statistics and Probability, Ed. J. Neyman (University of California Press, Berkeley, 1956).
2. K.J. Arrow, L. Hurwicz, H. Uzawa,Studies in linear and nonlinear programming (Stanford University Press, Stanford, Calif., 1958).
3. J.D. Buys, “Dual algorithms for constrained optimization problems”, Dissertation, University of Leiden, Leiden (1972).
4. G. Debreu, “Definite and semidefinite quadratic forms”,Econometrica 20 (1952) 295–300.
5. Institute of Statistics Mimeo Series;F.J. Gould,1971