@article{1183732662, author = {Putnam, Hilary}, title = {Decidability and Essential Undecidability}, journal = {J. Symbolic Logic}, volume = {22}, number = {1}, year = {1957}, pages = { 39-54}, language = {en}, url = {http://dml.mathdoc.fr/item/1183732662} }
Putnam, Hilary. Decidability and Essential Undecidability. J. Symbolic Logic, Tome 22 (1957) no. 1, pp. 39-54. http://gdmltest.u-ga.fr/item/1183732662/