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@article{MAN_1958__135_160608, author = {J.G. Kemeny}, title = {Undecidable {Problems} of {Elementary} {Number} {Theory.}}, journal = {Mathematische Annalen}, pages = {160--169}, publisher = {mathdoc}, volume = {135}, year = {1958}, zbl = {0081.24703}, url = {http://geodesic.mathdoc.fr/item/MAN_1958__135_160608/} }
J.G. Kemeny. Undecidable Problems of Elementary Number Theory.. Mathematische Annalen, Tome 135 (1958), pp. 160-169. http://geodesic.mathdoc.fr/item/MAN_1958__135_160608/