@techreport{ByronStent@98TR,
	address={Computer Science Department},
	author={Donna Byron and Amanda Stent},
	institution={University of Rochester},
	number={TR687},
	title={A Preliminary Model of Centering in Dialog},
	url={http://www.amandastent.com/papers/ByronStentTR1998.pdf},
	year=1998,
}