Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1970_113_a4, author = {G. S. Tseitin}, title = {The upper bounds of enumerable sets of constructive real numbers}, journal = {Informatics and Automation}, pages = {102--172}, publisher = {mathdoc}, volume = {113}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1970_113_a4/} }
G. S. Tseitin. The upper bounds of enumerable sets of constructive real numbers. Informatics and Automation, Problems of the constructive direction in mathematics. Part 5, Tome 113 (1970), pp. 102-172. http://geodesic.mathdoc.fr/item/TRSPY_1970_113_a4/