%0 Journal Article %A G. I. Petrashen %T Propagation of seismic wave fields in layered media. Part~II %J Zapiski Nauchnykh Seminarov POMI %D 2001 %P 11-142 %V 274 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2001_274_a1/ %G ru %F ZNSL_2001_274_a1