1. K. J. Arrow, F. J. Gould and S. M. Howe, "A general saddle point result for constrained optimization", Institute of Statistics Mimeo Series No. 774, Univ. of N. Carolina (Chapel Hill), 1971.
2. K. J. Arrow and R. M. Solow, "Gradient methods for constrained maxima, with weakened assumptions", in Studies in Linear and Nonlinear Programming, K. Arrow, L. Hurwicz and H. Uzawa (editors), Stanford Univ. Press, 1958.
3. D. P. Bertsekas, "Combined primal-dual and penalty methods for constrained minimization", SIAM J. Control, to appear.
4. J. D. Buys, "Dual algorithms for constrained optimization", Thesis, Leiden, 1972.
5. A. V. Fiacco and G. P. McCormick, Nonlinear Programming: Sequential Unconstrained Optimization Techniques, Wiley, 1968.