@inproceedings{SIGMOD-2007-XuJ,
	author        = "Zhengdao Xu and Hans-Arno Jacobsen",
	booktitle     = "{Proceedings of the 25th ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/1247480.1247545",
	isbn          = "978-1-59593-686-8",
	pages         = "581--592",
	publisher     = "{ACM}",
	title         = "{Adaptive location constraint processing}",
	year          = 2007,
}