%0 Journal Article %A L. V. Keldysh %T Monotone mappings of the cube %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1951 %P 72-76 %V 38 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1951_38_a6/ %G ru %F TM_1951_38_a6