BoolosP68'

BibTeX

@article{DBLP:journals/jsyml/BoolosP68,
  author    = {George Boolos and
               Hilary Putnam},
  title     = {Degrees of Unsolvability of Constructible Sets of Integers},
  journal   = {J. Symb. Log.},
  volume    = {33},
  number    = {4},
  year      = {1968},
  pages     = {497-513},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}