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@article{DAN_1968_181_3_a12, author = {L. A. Sakhnovich}, title = {Nonunitary operators with absolutely continuous spectrum on the unit cycle}, journal = {Doklady Akademii Nauk}, pages = {558--561}, publisher = {mathdoc}, volume = {181}, number = {3}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_181_3_a12/} }
L. A. Sakhnovich. Nonunitary operators with absolutely continuous spectrum on the unit cycle. Doklady Akademii Nauk, Tome 181 (1968) no. 3, pp. 558-561. http://geodesic.mathdoc.fr/item/DAN_1968_181_3_a12/