1. A subgradient duality theorem;Schechter;Journal of Mathematical Analysis and Applications,1977
2. Conjugate Duality in Convex Optimization;Boţ,2010
3. Convex Analysis in General Vector Spaces;Zălinescu,2002
4. Duality theorems for convex programming without constraint qualification;Kanniappan;Journal of the Australian Mathematical Society Series A,1984
5. A duality theorem for non-linear programming;Wolfe;Quarterly of Applied Mathematics,1961