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@article{TM_1970_113_a4, author = {G. S. Tseitin}, title = {The upper bounds of enumerable sets of constructive real numbers}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {102--172}, publisher = {mathdoc}, volume = {113}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1970_113_a4/} }
G. S. Tseitin. The upper bounds of enumerable sets of constructive real numbers. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Problems of the constructive direction in mathematics. Part 5, Tome 113 (1970), pp. 102-172. http://geodesic.mathdoc.fr/item/TM_1970_113_a4/