@inproceedings{CSL-2009-CockettS,
	author        = "J. Robin B. Cockett and Luigi Santocanale",
	booktitle     = "{Proceedings of the 18th EACSL Annual Conference / 23rd International Workshop on Computer Science Logic}",
	doi           = "10.1007/978-3-642-04027-6_16",
	isbn          = "978-3-642-04026-9",
	pages         = "194--208",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{On the Word Problem for ΣΠ-Categories, and the Properties of Two-Way Communication}",
	volume        = 5771,
	year          = 2009,
}