@article{FAA_1973_7_4_a5,
     author = {L. A. Nazarova and A. V. Roiter},
     title = {A problem of {I.} {M.} {Gel'fand}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {54--69},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1973_7_4_a5/}
}