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@article{AL_1972_11_3_a0, author = {V. V. V'yugin}, title = {Discrete classes of recursively enumerable sets}, journal = {Algebra i logika}, pages = {243--256}, publisher = {mathdoc}, volume = {11}, number = {3}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1972_11_3_a0/} }
V. V. V'yugin. Discrete classes of recursively enumerable sets. Algebra i logika, Tome 11 (1972) no. 3, pp. 243-256. http://geodesic.mathdoc.fr/item/AL_1972_11_3_a0/