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@article{AL_1994_33_5_a2, author = {A. Nies}, title = {The last question on recursively enumerable m-degrees}, journal = {Algebra i logika}, pages = {550--563}, publisher = {mathdoc}, volume = {33}, number = {5}, year = {1994}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1994_33_5_a2/} }
A. Nies. The last question on recursively enumerable m-degrees. Algebra i logika, Tome 33 (1994) no. 5, pp. 550-563. http://geodesic.mathdoc.fr/item/AL_1994_33_5_a2/