@inproceedings{SIGMOD-1990-BeckmannKSS,
	author        = "Norbert Beckmann and Hans-Peter Kriegel and Ralf Schneider and Bernhard Seeger",
	booktitle     = "{Proceedings of the 20th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD90/P322.PDF",
	doi           = "10.1145/93597.98741",
	pages         = "322--331",
	title         = "{The R*-Tree: An Efficient and Robust Access Method for Points and Rectangles}",
	year          = 1990,
}