@inproceedings{CHI-1990-Olsen,
	author        = "Dan R. Olsen Jr.",
	booktitle     = "{Proceedings of the Eighth ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/97243.97252",
	isbn          = "0-201-50932-6",
	pages         = "57--64",
	publisher     = "{ACM}",
	title         = "{Propositional production systems for dialog description}",
	year          = 1990,
}