%0 Journal Article %A B. P. Belinskii %T On the uniqueness and non-uniqueness of solutions of boundary-contact acoustic problems %J Zapiski Nauchnykh Seminarov POMI %D 1983 %P 21-32 %V 128 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1983_128_a2/ %G ru %F ZNSL_1983_128_a2