%0 Journal Article %A V. V. Fedorchuk %T Multivalued retractions and characterizations of $n$-soft mappings %J Trudy Moskovskogo matematičeskogo obŝestva %D 1988 %P 169-207 %V 51 %I mathdoc %U http://geodesic.mathdoc.fr/item/MMO_1988_51_a4/ %G ru %F MMO_1988_51_a4