%0 Journal Article %A V. S. Buldyrev %A M. I. Yavor %T A~combined representation of an acoustic field in the underwater sound channel and asymptotic summation of normal modes %J Zapiski Nauchnykh Seminarov POMI %D 1981 %P 66-83 %V 104 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1981_104_a6/ %G ru %F ZNSL_1981_104_a6