@inproceedings{HT-2011-ZubiagaKS,
	author        = "Arkaitz Zubiaga and Christian Körner and Markus Strohmaier",
	booktitle     = "{Proceedings of the 22nd Conference on Hypertext and Hypermedia}",
	doi           = "10.1145/1995966.1995981",
	isbn          = "978-1-4503-0256-2",
	pages         = "93--102",
	publisher     = "{ACM}",
	title         = "{Tags vs shelves: from social tagging to social classification}",
	year          = 2011,
}