@INPROCEEDINGS {
	AUTHOR = "Pablo Barcel{\'o} and Jorge P{\'e}rez and Juan Reutter",
	TITLE = "Relative Expressiveness of Nested Regular Expressions",
	BOOKTITLE = "6th Alberto Mendelzon International Workshop on Foundations of Data Management (AMW)",
	PAGES = "180-195",
	MONTH = "Jun",
	YEAR = "2012",
	ADDRESS = "Ouro Preto, Brazil",
	PUBLISHER = "CEUR Publications",
	SERIES ="CEUR Workshop Proceedings",
	}