%0 Journal Article %A V. S. Buslaev %T Scattered plane waves, spectral asymptotics and trace formulas in exterior problems %J Doklady Akademii Nauk %D 1971 %P 999-1002 %V 197 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1971_197_5_a2/ %G ru %F DAN_1971_197_5_a2