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@article{MZM_1989_45_2_a9, author = {R. Sh. Omanadze}, title = {Classes of recursively enumerable sets and $Q$-reducibility}, journal = {Matemati\v{c}eskie zametki}, pages = {79--82}, publisher = {mathdoc}, volume = {45}, number = {2}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1989_45_2_a9/} }
R. Sh. Omanadze. Classes of recursively enumerable sets and $Q$-reducibility. Matematičeskie zametki, Tome 45 (1989) no. 2, pp. 79-82. http://geodesic.mathdoc.fr/item/MZM_1989_45_2_a9/