@article{TM_1951_38_a6,
     author = {L. V. Keldysh},
     title = {Monotone mappings of the cube},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {72--76},
     year = {1951},
     volume = {38},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1951_38_a6/}
}