@INCOLLECTION{barw:mode89,
	AUTHOR =	"Jon Barwise and John Etchemendy",
	YEAR =		"1989",
	TITLE =		"{Model-Theoretic Semantics}",
	BOOKTITLE =	"Foundations of Cognitive Science",
	EDITOR =	"M. I. Posner",
	PUBLISHER =	"MIT Press",
	ADDRESS =	"Cambridge, MA",
	PAGES =		"207--43"
	}%

@InCollection{barw:info90,
  author = 	"Barwise, Jon and Etchemendy, John",
  title = 	"{Information, Infons, and Inference}",
  booktitle = 	"{Situation Theory and Its Applications, I}",
  series =      "CSLI Lecture Notes Number 22",
  publisher = 	"CSLI Publications",
  year = 	"1990",
  editor = 	"Robin Cooper and Kuniaki Mukai and John Perry",
  pages =       "33--78", 
  address = 	"Stanford"
}

@BOOK{chel:moda80,
	AUTHOR =	"Brian F. Chellas",
	YEAR =		"1980",
	TITLE =		"{Modal Logic: An Introduction}",
	ADDRESS =	"Cambridge",
	PUBLISHER =	"Cambridge University Press"
	}%

@Article{barw:gene81,
  author = 	"Jon Barwise and Robin Cooper",
  title = 	"{Generalized Quantifiers and Natural Language}",
  journal = 	"{Linguistics and Philosophy}",
  year = 	"1981",
  volume = 	"4",
  pages = 	"159--219"
}

@Article{chom:barr86,
  author = 	"Noam Chomsky",
  title = 	"{Barriers}",
  journal = 	"Linguistic Inquiry Monograph",
  year = 	"1986",
  volume = 	"13"
}

@Book{lewi:plur86,
  author = 	"Lewis, David K.",
  title = 	"{On the Plurality of Worlds}",
  publisher = 	"Blackwell",
  year = 	"1986",
  address = 	"Oxford"
}