@ARTICLE {
	AUTHOR = "Pablo Barcel{\'o} and Anthony Widjaja Lin and Leonid Libkin and Peter Wood",
	TITLE ="Expressive Languages for Path Queries over Graph-structured Data",
	JOURNAL = "Transactions on Database Systems (TODS)",
	VOLUME = "37",
	NUMBER = "4",
	PAGES = "article 31",
	YEAR = "2012",
	PUBLISHER = "ACM Press",
	ADDRESS = "New York, NY, USA",
	ISSN = "0362-5915"
	}