@inproceedings{CSL-2009-Sumii,
	author        = "Eijiro Sumii",
	booktitle     = "{Proceedings of the 18th EACSL Annual Conference / 23rd International Workshop on Computer Science Logic}",
	doi           = "10.1007/978-3-642-04027-6_33",
	isbn          = "978-3-642-04026-9",
	pages         = "455--469",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{A Complete Characterization of Observational Equivalence in Polymorphic λ-Calculus with General References}",
	volume        = 5771,
	year          = 2009,
}