1. Symmetric dual nonlinear programs;Dantzig;Pacific J. Math.,1965
2. A symmetric dual theorem for nonlinear programs;Mond;Quart. Appl. Math.,1965
3. Generalized concavity and duality;Mond,1981
4. Symmetric duality with pseudo-invexity in variational problems;Kim;Optimization,1993
5. Symmetric and self duality in multiobjective programming;Weir;Asia-Pacific J. Oper. Res.,1988