%0 Journal Article %A N. S. Smirnova %T Calculation of the wave fields for multiple waves near the point of origin %J Zapiski Nauchnykh Seminarov POMI %D 1968 %P 212-240 %V 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1968_9_a10/ %G ru %F ZNSL_1968_9_a10