%0 Journal Article %A V. M. Babich %A D. B. Dement'ev %A B. A. Samokish %A V. P. Smyshlyaev %T Scattering of a highfrequency wave by the vertex of an arbitrary cone. (Singular directions.) %J Zapiski Nauchnykh Seminarov POMI %D 2000 %P 7-21 %V 264 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2000_264_a0/ %G ru %F ZNSL_2000_264_a0