@inproceedings{CIKM-2012-Baeza-YatesL,
	author        = "Ricardo A. Baeza-Yates and Mounia Lalmas",
	booktitle     = "{Proceedings of the 21st ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/2396761.2396763",
	isbn          = "978-1-4503-1156-4",
	pages         = "1--2",
	publisher     = "{ACM}",
	title         = "{User engagement: the network effect matters!}",
	year          = 2012,
}