%0 Journal Article %A V. A. Shurygin %T Constructive sets with equality and their mappings %J Doklady Akademii Nauk %D 1967 %P 54-57 %V 173 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_173_1_a13/ %G ru %F DAN_1967_173_1_a13