%0 Journal Article %A L. A. Molotkov %T On the dispersion equations of layered media with unhard contact on some boundaries %J Zapiski Nauchnykh Seminarov POMI %D 1973 %P 103-116 %V 34 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1973_34_a6/ %G ru %F ZNSL_1973_34_a6