@inproceedings{SIGMOD-1998-GrumbachRS,
	author        = "Stéphane Grumbach and Philippe Rigaux and Luc Segoufin",
	booktitle     = "{Proceedings of the 28th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD98/P213.PDF",
	doi           = "10.1145/276304.276324",
	isbn          = "0-89791-995-5",
	pages         = "213--224",
	publisher     = "{ACM Press}",
	title         = "{The DEDALE System for Complex Spatial Queries}",
	year          = 1998,
}