@inproceedings{SIGMOD-1982-Tamminen,
	author        = "Markku Tamminen",
	booktitle     = "{Proceedings of the 12th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD82/P200.PDF",
	doi           = "10.1145/582353.582389",
	pages         = "200--206",
	publisher     = "{ACM Press}",
	title         = "{Efficient Spatial Access to a Data Base}",
	year          = 1982,
}