%0 Journal Article %A V. M. Babich %A A. A. Klimova %T A~hyperbolic equation with a~large parameter, with low-order terms, and wave hierarchy %J Algebra i analiz %D 1994 %P 126-171 %V 6 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/AA_1994_6_5_a2/ %G ru %F AA_1994_6_5_a2