@article{FAA_1979_13_4_a16,
     author = {A. N. Kochubei},
     title = {Symmetric operators commuting with a family of unitary operators},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {77--78},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1979_13_4_a16/}
}