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@article{AL_1976_15_3_a0, author = {A. N. Degtev}, title = {Partially ordered sets of $1$-degrees that occur in recursively}, journal = {Algebra i logika}, pages = {249--266}, publisher = {mathdoc}, volume = {15}, number = {3}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1976_15_3_a0/} }
A. N. Degtev. Partially ordered sets of $1$-degrees that occur in recursively. Algebra i logika, Tome 15 (1976) no. 3, pp. 249-266. http://geodesic.mathdoc.fr/item/AL_1976_15_3_a0/