@inproceedings{CSL-2011-SchwinghammerB,
	author        = "Jan Schwinghammer and Lars Birkedal",
	booktitle     = "{Proceedings of the 20th EACSL Annual Conference / 25th International Workshop on Computer Science Logic}",
	doi           = "10.4230/LIPIcs.CSL.2011.512",
	isbn          = "978-3-939897-32-3",
	pages         = "512--524",
	publisher     = "{Schloss Dagstuhl — Leibniz-Zentrum für Informatik}",
	series        = "{Leibniz International Proceedings in Informatics}",
	title         = "{Step-Indexed Relational Reasoning for Countable Nondeterminism}",
	volume        = 12,
	year          = 2011,
}