@inproceedings{CHI-2009-SchrammelLT,
	author        = "Johann Schrammel and Michael Leitner and Manfred Tscheligi",
	booktitle     = "{Proceedings of the 27th ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/1518701.1519010",
	isbn          = "978-1-60558-246-7",
	pages         = "2037--2040",
	publisher     = "{ACM}",
	title         = "{Semantically structured tag clouds: an empirical evaluation of clustered presentation approaches}",
	year          = 2009,
}