@ARTICLE {
	AUTHOR = "Pablo Barcel{\'o}",
	TITLE ="Logical Foundations of Relational Data Exchange",
	JOURNAL = "SIGMOD Record",
	VOLUME = "38",
	NUMBER = "1",
	PAGES = "49-58",
	MONTH = "Mar",
	YEAR = "2009",
	PUBLISHER = "ACM Press",
	ADDRESS = "New York, NY, USA",
	ISSN = "0163-5808"
	}