%0 Journal Article %A I. A. Molotkov %A I. V. Muhina %T Nonstationary wave propagation velocity minimum %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1966 %P 165-181 %V 92 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1966_92_a10/ %G ru %F TM_1966_92_a10