@article{mcchay69,
  added-at = {2007-11-23T14:13:20.000+0100},
  author = {McCarthy, J. and Hayes, P.},
  biburl = {http://www.bibsonomy.org/bibtex/231b320e8e2bbe02d1c3ade86ac4ea630/ramaz},
  interhash = {14eec30479d6e045cab1ef0d58846681},
  intrahash = {31b320e8e2bbe02d1c3ade86ac4ea630},
  journal = {Machine Intelligence},
  keywords = {calculus, frame logic, modal problem situation},
  owner = {Mauro},
  pages = {463--502},
  review = {modalities without modal logic},
  timestamp = {2007-11-23T14:13:20.000+0100},
  title = {Some Philosophical Problems from the Standpoint of Artificial Intelligence},
  volume = 4,
  year = 1969
}