@inproceedings{KR-1996-JonssonDB,
	author        = "Peter Jönsson and Thomas Drakengren and Christer Bäckström",
	booktitle     = "{Proceedings of the Fifth International Conference on Principles of Knowledge Representation and Reasoning}",
	isbn          = "1-55860-421-9",
	pages         = "352--363",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Tractable Subclasses of the Point-Interval Algebra: A Complete Classification}",
	year          = 1996,
}