%0 Journal Article %A V. G. Romanov %T A uniqueness and stability theorem for a nonlinear operator equation %J Doklady Akademii Nauk %D 1972 %P 1051-1053 %V 207 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1972_207_5_a8/ %G ru %F DAN_1972_207_5_a8