%0 Journal Article %A V. M. Babich %T Space-time ray method and quasiphotons %J Zapiski Nauchnykh Seminarov POMI %D 2007 %P 5-13 %V 342 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2007_342_a0/ %G ru %F ZNSL_2007_342_a0