@Inproceedings{schmitz2006mining,
  author = {Schmitz, Christoph and Hotho, Andreas and Jäschke, Robert and Stumme, Gerd},
  title  = {Mining Association Rules in Folksonomies},

  year   = {2006},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/hotho/pub/2006/schmitz2006asso_ifcs.pdf},
  doi = {10.1007/3-540-34416-0_28},
  const  = {\ text}
}
@Inproceedings{Mika2005,
  author = {Mika, Peter},
  title  = {Ontologies Are Us: A Unified Model of Social Networks and Semantics},

  year   = {2005},
  number = {},
  url    = {http://www.cs.vu.nl/~pmika/research/papers/ISWC-folksonomy.pdf},
  doi = {10.1007/11574620_38},
  const  = {\ text}
}
@Article{heylighen98bootstrapping,
  author = {Heylighen, Francis},
  title  = {Bootstrapping knowledge representations: from entailment meshes via semantic nets to learning webs},
  journal = {Kybernetes},
  year   = {2001},
  number = {5/6},
  url    = {citeseer.nj.nec.com/francis96bootstrapping.html},

  const  = {\ text}
}