@inproceedings{PPDP-2010-Barbanerad,
	author        = "Franco Barbanera and Ugo de'Liguoro",
	booktitle     = "{Proceedings of the 12th International Conference on Principles and Practice of Declarative Programming}",
	doi           = "10.1145/1836089.1836109",
	isbn          = "978-1-4503-0132-9",
	pages         = "155--164",
	publisher     = "{ACM}",
	title         = "{Two notions of sub-behaviour for session-based client/server systems}",
	year          = 2010,
}