@article{FAA_1968_2_1_a4,
     author = {L. A. Sakhnovich},
     title = {Operators which are similar to unitary operators with absolutely continuous spectrum},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {51--63},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1968_2_1_a4/}
}