Putnam60'

BibTeX

@article{DBLP:journals/jsyml/Putnam60,
  author    = {Hilary Putnam},
  title     = {An Unsolvable Problem in Number Theory},
  journal   = {J. Symb. Log.},
  volume    = {25},
  number    = {3},
  year      = {1960},
  pages     = {220-232},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}