@article{RM_1968_23_6_a1,
     author = {A. D. Ioffe and V. M. Tikhomirov},
     title = {Duality of convex functions and extremum problems},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {53--124},
     publisher = {mathdoc},
     volume = {23},
     number = {6},
     year = {1968},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1968_23_6_a1/}
}