@article{DAN_1969_185_4_a0,
     author = {M. Sh. Birman},
     title = {Some applications of a local criterion for the existence of wave operators},
     journal = {Doklady Akademii Nauk},
     pages = {735--738},
     publisher = {mathdoc},
     volume = {185},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_185_4_a0/}
}