%0 Journal Article %A È. I. Veliev %T On the theory of two-dimensional wave diffraction by a polygonal %J Doklady Akademii Nauk %D 1985 %P 319-323 %V 285 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1985_285_2_a13/ %G ru %F DAN_1985_285_2_a13