@inproceedings{VLDB-1981-Karlsson,
	author        = "Kjell Karlsson",
	booktitle     = "{Proceedings of the Seventh International Conference on Very Large Data Bases}",
	cdrom         = "VLDB81/P345.PDF",
	pages         = "345--353",
	publisher     = "{IEEE Computer Society}",
	title         = "{Reduced Cover-Trees and their Application in the Sabre Access Path Model}",
	year          = 1981,
}