@inproceedings{KDD-1998-EsterFKS,
	author        = "Martin Ester and Alexander Frommelt and Hans-Peter Kriegel and Jörg Sander",
	booktitle     = "{Proceedings of the Fourth International Conference on Knowledge Discovery and Data Mining}",
	ee            = "http://www.aaai.org/Library/KDD/1998/kdd98-007.php",
	isbn          = "1-57735-070-7",
	pages         = "44--50",
	publisher     = "{AAAI Press}",
	title         = "{Algorithms for Characterization and Trend Detection in Spatial Databases}",
	year          = 1998,
}