%0 Journal Article %A V. G. Romanov %T An abstract inverse problem and questions of its uniqueness %J Funkcionalʹnyj analiz i ego priloženiâ %D 1973 %P 67-74 %V 7 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1973_7_3_a6/ %G ru %F FAA_1973_7_3_a6