@inproceedings{HT-2009-BoellaTV,
	author        = "Guido Boella and Leendert W. N. van der Torre and Serena Villata",
	booktitle     = "{Proceedings of the 20th Conference on Hypertext and Hypermedia}",
	doi           = "10.1145/1557914.1557989",
	isbn          = "978-1-60558-486-7",
	pages         = "361--362",
	publisher     = "{ACM}",
	title         = "{Four measures for the dynamics of coalitions in social networks}",
	year          = 2009,
}