@inproceedings{PODS-2000-BenediktGLS,
	author        = "Michael Benedikt and Martin Grohe and Leonid Libkin and Luc Segoufin",
	booktitle     = "{Proceedings of the 19th Symposium on Principles of Database Systems}",
	doi           = "10.1145/335168.335213",
	isbn          = "1-58113-214-X",
	pages         = "104--115",
	publisher     = "{ACM}",
	title         = "{Reachability and Connectivity Queries in Constraint Databases}",
	year          = 2000,
}