%0 Journal Article %A M. V. Fedoryuk %A A. M. Nurmagomedov %T The Neumann problem for the Helmholtz equation in the exterior of an infinite cylinder %J Differencialʹnye uravneniâ %D 1985 %P 534-535 %V 21 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1985_21_3_a26/ %G ru %F DE_1985_21_3_a26