@article{Gaz88,
	title = {Category Structures},
	author = {Gerald Gazdar and Geoffrey K. Pullum and Bob Carpenter and Ewan Klein and Thomas E. Hukari and Robert D. Levine},
	journal = {Computational Linguistics},
	number = {1},
	pages = {1--19},
	volume = {14},
	year = {1988},
	biburl = {http://www.bibsonomy.org/bibtex/22d6289ccdd5a531ecc17e3958a797dbc/nlp},
	keywords = {2000 book nlp }
}