Marcus50'

BibTeX

@article{DBLP:journals/jsyml/Marcus50,
  author    = {Ruth Barcan Marcus},
  title     = {The Elimination of Contextually Defined Predicates in a
               Modal System},
  journal   = {J. Symb. Log.},
  volume    = {15},
  number    = {2},
  year      = {1950},
  pages     = {92},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}