Martin50'

BibTeX

@article{DBLP:journals/jsyml/Martin50,
  author    = {R. M. Martin},
  title     = {On Virtual Classes and Real Numbers},
  journal   = {J. Symb. Log.},
  volume    = {15},
  number    = {2},
  year      = {1950},
  pages     = {131-134},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}