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@article{MZM_1987_42_5_a11, author = {A. N. Degtev}, title = {Computable numberings to which noncomputable numberings are positively reducible}, journal = {Matemati\v{c}eskie zametki}, pages = {723--728}, publisher = {mathdoc}, volume = {42}, number = {5}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1987_42_5_a11/} }
A. N. Degtev. Computable numberings to which noncomputable numberings are positively reducible. Matematičeskie zametki, Tome 42 (1987) no. 5, pp. 723-728. http://geodesic.mathdoc.fr/item/MZM_1987_42_5_a11/