%0 Journal Article %A R. S. Sadyrkhanov %T A condition for a mapping to be a local homeomorphism %J Doklady Akademii Nauk %D 1984 %P 1316-1320 %V 275 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1984_275_6_a8/ %G ru %F DAN_1984_275_6_a8