@article{ZNSL_1983_128_a2,
     author = {B. P. Belinskii},
     title = {On the uniqueness and non-uniqueness of solutions of boundary-contact acoustic problems},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {21--32},
     publisher = {mathdoc},
     volume = {128},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_128_a2/}
}