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@article{AL_1978_17_6_a2, author = {S. D. Denisov}, title = {Structure of the upper semilattice of recursively enumerable}, journal = {Algebra i logika}, pages = {643--683}, publisher = {mathdoc}, volume = {17}, number = {6}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1978_17_6_a2/} }
S. D. Denisov. Structure of the upper semilattice of recursively enumerable. Algebra i logika, Tome 17 (1978) no. 6, pp. 643-683. http://geodesic.mathdoc.fr/item/AL_1978_17_6_a2/