@INPROCEEDINGS {
	AUTHOR = "Pablo Barcel{\'o} and Miguel Romero and Moshe Vardi",
	TITLE = "Semantic Acyclicity on Graph Databases",
	BOOKTITLE = "32nd ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems (PODS)",
	PAGES = "237-248",
	MONTH = "Jun",
	YEAR = "2013",
	ADDRESS = "New York, NY, USA",
	PUBLISHER = "ACM Press",
	SERIES ="ACM International Conference Proceeding Series",
	}