@book{alani2008proceedings,,
  title = {Proceedings of the Dagstuhl Seminar on Social Web Communities},
  publisher = {Schloss Dagstuhl},
  year = {2008},
  url = {http://www.dagstuhl.de/en/program/calendar/semhp/?semnr=08391}
}

@inproceedings{krause2008antisocialb,
  author = {Krause, Beate and Schmitz, Christoph and Hotho, Andreas and Stumme, Gerd},
  title = {The Anti-Social Tagger - Detecting Spam in Social Bookmarking Systems},
  booktitle = {Proc. of the Fourth International Workshop on  Adversarial Information Retrieval on the Web},
  year = {2008},
  url = {http://airweb.cse.lehigh.edu/2008/submissions/krause_2008_anti_social_tagger.pdf}
}