@book{PrillR05,
	title = {Playfully Assigning Keywords to Content},
	author = {Michael Prilla and Carsten Ritterskamp},
	url = {https://web-imtm.iaw.ruhr-uni-bochum.de/pub/bscw.cgi/0/208299/30524/30524.pdf},
	year = {2005},
	biburl = {http://www.bibsonomy.org/bibtex/2755b2327ce5d31b6bbbf1ec43bd94f4a/imtm},
	imtm-code = {30524},
	keywords = {2005 IMTMPubl accepted prilla ritterskamp zur_Diskussion }
}