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2. Beale, E.M.L. (1967), Numerical Methods, in J. Abadie (Ed.), Nonlinear Programming, North-Holland. (This reference contains the worked solution of the problem 4.7.2 by Beale’s method.)
3. Ben-Israel, A., Ben-Tal, A., and Zlobec, S. (1976), Optimality conditions in convex programming, IX International Symposium on Mathematical Programming, Budapest.
4. Craven, B.D., and Mond, B. (1971), On converse duality in nonlinear programming, Operations Research, 19, 1075–1078. (Some other references are listed in this paper.)
5. Craven, B.D., and Mond, B. (1973), Transposition theorems for cone-convex functions, SIAM J. Appl. Math., 24, 603–612. (For the Fritz-John theorem in Banach space, and an optimal control application.)