%0 Journal Article %A Ya. N. Fel'd %T Diffraction of a scalar wave on a nonclosed surface with a Dirichlet boundary condition %J Doklady Akademii Nauk %D 1972 %P 1321-1324 %V 206 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1972_206_6_a13/ %G ru %F DAN_1972_206_6_a13