@inproceedings{RecSys-2013-Ester,
	author        = "Martin Ester",
	booktitle     = "{Proceedings of the Seventh Conference on Recommender Systems}",
	doi           = "10.1145/2507157.2508062",
	isbn          = "978-1-4503-2409-0",
	pages         = "491--492",
	publisher     = "{ACM}",
	title         = "{Recommendation in social networks}",
	year          = 2013,
}