@article{MAT_1964_8_5_a4,
     author = {Hilary Putnam},
     title = {An unsolvable problem in number theory},
     journal = {Matematika},
     pages = {55--68},
     year = {1964},
     volume = {8},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1964_8_5_a4/}
}