%0 Journal Article %A A. P. Katchalov %T Two-parameter asymptotic formulas for space-time Gaussian beams in an elastic media %J Zapiski Nauchnykh Seminarov POMI %D 1988 %P 87-95 %V 173 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1988_173_a6/ %G ru %F ZNSL_1988_173_a6