@inproceedings{SIGMOD-1989-Orenstein,
	author        = "Jack A. Orenstein",
	booktitle     = "{Proceedings of the 19th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD89/P294.PDF",
	doi           = "10.1145/67544.66954",
	pages         = "295--305",
	title         = "{Redundancy in Spatial Databases}",
	year          = 1989,
}