%0 Journal Article %A V. Ya. Ivrii %T The nonclassical propagation of singularities of a solution of the wave equation near a boundary %J Doklady Akademii Nauk %D 1978 %P 1013-1015 %V 241 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1978_241_5_a3/ %G ru %F DAN_1978_241_5_a3