@inproceedings{jaschke07recommender,
  author = {Jäschke, Robert and Marinho, Leandro Balby and Hotho, Andreas and Schmidt-Thieme, Lars and Stumme, Gerd},
  title = {Tag Recommendations in Folksonomies},
  booktitle = {Knowledge Discovery in Databases: PKDD 2007, 11th European Conference on Principles and Practice of Knowledge Discovery in Databases, Warsaw, Poland, September 17-21, 2007, Proceedings},
  publisher = {Springer},
  year = {2007},
  volume = {4702},
  pages = {506-514},
  url = {http://www.kde.cs.uni-kassel.de/hotho/pub/2007/Tag_Recommender_in_Folksonomies_final.pdf}
}

@inproceedings{hotho2006information,
  author = {Hotho, Andreas and Jäschke, Robert and Schmitz, Christoph and Stumme, Gerd},
  title = {Information Retrieval in Folksonomies: Search and Ranking},
  booktitle = {Proceedings of the 3rd European Semantic Web Conference },
  publisher = {Springer},
  year = {2006},
  volume = {4011},
  pages = {411-426},
  url = {http://www.kde.cs.uni-kassel.de/hotho/pub/2006/seach2006hotho_eswc.pdf}
}

@inproceedings{Pageetal98,
  author = {Page, L. and Brin, S. and Motwani, R. and Winograd, T.},
  title = {The PageRank citation ranking: Bringing order to the Web},
  booktitle = {Proceedings of the 7th International World Wide Web Conference},
  year = {1998},
  pages = {161--172},
  url = {citeseer.nj.nec.com/page98pagerank.html}
}