%0 Journal Article %A L. A. Sakhnovich %T A~semi-inverse problem %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1963 %V 18 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1963_18_3_a12/ %G ru %F RM_1963_18_3_a12