@inproceedings{CSL-2008-Berardid,
	author        = "Stefano Berardi and Ugo de'Liguoro",
	booktitle     = "{Proceedings of the 17th EACSL Annual Conference / 22nd International Workshop on Computer Science Logic}",
	doi           = "10.1007/978-3-540-87531-4_17",
	isbn          = "978-3-540-87530-7",
	pages         = "215--229",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{A Calculus of Realizers for EM1 Arithmetic}",
	volume        = 5213,
	year          = 2008,
}