@article{1183734013, author = {Putnam, Hilary}, title = {An Unsolvable Problem in Number Theory}, journal = {J. Symbolic Logic}, volume = {25}, number = {1}, year = {1960}, pages = { 220-232}, language = {en}, url = {http://dml.mathdoc.fr/item/1183734013} }
Putnam, Hilary. An Unsolvable Problem in Number Theory. J. Symbolic Logic, Tome 25 (1960) no. 1, pp. 220-232. http://gdmltest.u-ga.fr/item/1183734013/