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@article{MZ_1952__57_169302, author = {Georg Kreisel}, title = {Some concepts concerning formal systems on number theory.}, journal = {Mathematische Zeitschrift}, pages = {1--12}, publisher = {mathdoc}, volume = {57}, year = {1952}, zbl = {0048.24702}, url = {http://geodesic.mathdoc.fr/item/MZ_1952__57_169302/} }
Georg Kreisel. Some concepts concerning formal systems on number theory.. Mathematische Zeitschrift, Tome 57 (1952), pp. 1-12. http://geodesic.mathdoc.fr/item/MZ_1952__57_169302/