@inproceedings{PODS-2006-BojanczykDMSS,
	author        = "Mikolaj Bojanczyk and Claire David and Anca Muscholl and Thomas Schwentick and Luc Segoufin",
	booktitle     = "{Proceedings of the 25th Symposium on Principles of Database Systems}",
	doi           = "10.1145/1142351.1142354",
	isbn          = "1-59593-318-2",
	pages         = "10--19",
	publisher     = "{ACM}",
	title         = "{Two-variable logic on data trees and XML reasoning}",
	year          = 2006,
}