@inproceedings{CIKM-2009-GobelHNB,
	author        = "Richard Göbel and Andreas Henrich and Raik Niemann and Daniel Blank",
	booktitle     = "{Proceedings of the 18th ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/1645953.1646188",
	isbn          = "978-1-60558-512-3",
	pages         = "1625--1628",
	publisher     = "{ACM}",
	title         = "{A hybrid index structure for geo-textual searches}",
	year          = 2009,
}