Fitch44'

BibTeX

@article{DBLP:journals/jsyml/Fitch44,
  author    = {Frederic Brenton Fitch},
  title     = {Representations of Calculi},
  journal   = {J. Symb. Log.},
  volume    = {9},
  number    = {3},
  year      = {1944},
  pages     = {57-62},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}