@inproceedings{PODS-2000-DantsinV,
	author        = "Evgeny Dantsin and Andrei Voronkov",
	booktitle     = "{Proceedings of the 19th Symposium on Principles of Database Systems}",
	doi           = "10.1145/335168.335218",
	isbn          = "1-58113-214-X",
	pages         = "157--165",
	publisher     = "{ACM}",
	title         = "{Expressive Power and Data Complexity of Query Languages for Trees and Lists}",
	year          = 2000,
}