AndersonB59'

BibTeX

@article{DBLP:journals/jsyml/AndersonB59,
  author    = {Alan Ross Anderson and
               Nuel Belnap},
  title     = {Modalities in Ackermann's "Rigorous Implication"},
  journal   = {J. Symb. Log.},
  volume    = {24},
  number    = {2},
  year      = {1959},
  pages     = {107-111},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}