@article{RM_1974_29_3_a30,
     author = {O. V. Piontkovskii},
     title = {The minimization of nonlinear functionals in normed spaces},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {29},
     number = {3},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1974_29_3_a30/}
}