1. On symmetric duality in nonlinear programming;Bazaraa;Operations Research,1973
2. Further generalization of convexity in mathematical programming;Hanson;Journal of Information and Optimization Sciences,1982
3. O.L. Mangasarian, Nonlinear Programming, McGraw-Hill, New York, 1969
4. B. Mond, T. Weir, Generalized concavity and duality, in: S. Schaible, W.T. Ziemba (Eds.), Generalized Concavity in Optimization and Economics, Academic Press, New York, 1981, pp. 263–279
5. Pseudo-invexity and duality in nonlinear programming;Nanda;European Journal of Operational Research,1996