@inproceedings{Mika2005,
  author = {Mika, Peter},
  title = {Ontologies Are Us: A Unified Model of Social Networks and Semantics},
  booktitle = {International Semantic Web Conference},
  publisher = {Springer},
  year = {2005},
  pages = {522-536},
  url = {http://www.cs.vu.nl/~pmika/research/papers/ISWC-folksonomy.pdf},
  doi = {http://dx.doi.org/10.1007/11574620_38}
}

@article{heylighen98bootstrapping,
  author = {Heylighen, Francis},
  title = {Bootstrapping knowledge representations: from entailment meshes via semantic nets to learning webs},
  journal = {Kybernetes},
  year = {2001},
  volume = {30},
  number = {5/6},
  pages = {691--722},
  url = {citeseer.nj.nec.com/francis96bootstrapping.html}
}