http://www.colorado.edu/linguistics/jurafsky/cogsci-journal.ps http://www.colorado.edu/linguistics/jurafsky/srini2.ps http://www.colorado.edu/linguistics/jurafsky/cogsci-journal.ps http://www.colorado.edu/linguistics/jurafsky/srini2.ps http://www.Colorado.EDU/ling/jurafsky/TENNET.pdf http://titan.cog.brown.edu/~mgregory/finaldiss.pdf