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@article{DAN_1984_278_2_a8, author = {V. D. Stepanov}, title = {On a problem of {Halmos} and {Sunder}}, journal = {Doklady Akademii Nauk}, pages = {296--298}, publisher = {mathdoc}, volume = {278}, number = {2}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1984_278_2_a8/} }
V. D. Stepanov. On a problem of Halmos and Sunder. Doklady Akademii Nauk, Tome 278 (1984) no. 2, pp. 296-298. http://geodesic.mathdoc.fr/item/DAN_1984_278_2_a8/