@inproceedings{RTA-2012-AccattoliL,
	author        = "Beniamino Accattoli and Ugo Dal Lago",
	booktitle     = "{Proceedings of the 23rd International Conference on Rewriting Techniques and Applications}",
	doi           = "10.4230/LIPIcs.RTA.2012.22",
	editor        = "Ashish Tiwari",
	isbn          = "978-3-939897-38-5",
	pages         = "22--37",
	publisher     = "{Schloss Dagstuhl — Leibniz-Zentrum für Informatik}",
	series        = "{Leibniz International Proceedings in Informatics}",
	title         = "{On the Invariance of the Unitary Cost Model for Head Reduction}",
	volume        = 15,
	year          = 2012,
}