Christian Körner Dominik Benz Andreas Hotho Markus Strohmaier Gerd Stumme Stop thinking, start tagging: tag semantics emerge from collaborative verbosity. 521-530 2010 WWW http://doi.acm.org/10.1145/1772690.1772744 conf/www/2010 db/conf/www/www2010.html#KornerBHSS10