%0 Journal Article %A V. A. Shurygin %T Constructive sets with an equality and their mappings %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1970 %P 173-259 %V 113 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1970_113_a5/ %G ru %F TM_1970_113_a5