@INPROCEEDINGS {
	AUTHOR = "Pablo Barcel{\'o} and Miguel Romero and Moshe Vardi",
	TITLE = "Does Query Evaluation Tractability Help Query Containment?",
	BOOKTITLE = "33th ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems (PODS)",
	PAGES = "188-199",
	MONTH = "Jun",
	YEAR = "2014",
	ADDRESS = "Snowbird, Utah, USA",
	PUBLISHER = "ACM Press",
	SERIES ="ACM International Conference Proceeding Series",
	}