%0 Journal Article %A V. V. Barkovskii %T Investigation of two scattering problems of the type of Steklov's problem %J Doklady Akademii Nauk %D 1974 %P 257-260 %V 218 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1974_218_2_a0/ %G ru %F DAN_1974_218_2_a0