%0 Journal Article %A L. A. Molotkov %T Coefficients of reflection and refraction in the case of elastic-fluid systems %J Zapiski Nauchnykh Seminarov POMI %D 1976 %P 154-167 %V 62 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1976_62_a12/ %G ru %F ZNSL_1976_62_a12