%0 Journal Article %A V. M. Babich %A V. V. Ulin %T Complex space-time ray method and “quasifotons” %J Zapiski Nauchnykh Seminarov POMI %D 1981 %P 5-12 %V 117 %U http://geodesic.mathdoc.fr/item/ZNSL_1981_117_a0/ %G ru %F ZNSL_1981_117_a0