@article{FAA_1971_5_2_a7,
     author = {A. L. Belopol'skii},
     title = {Scattering problems for two spaces with an unbounded identification operator},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {77--78},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1971_5_2_a7/}
}