@book{berendt2008challenge,
  editor = {Berendt, Bettina and Glance, Natalie and Hotho, Andreas},
  interhash = {ab9a3d6f27b2bc93cb8137a0f7988271},
  intrahash = {50f6cd75018d7ee98f49c5ab4ef0faaf},
  publisher = {Workshop at 18th Europ. Conf. on Machine Learning (ECML'08) / 11th Europ. Conf. on Principles and Practice of Knowledge Discovery in Databases (PKDD'08)},
  title = {Wikis, Blogs, Bookmarking Tools - Mining the Web 2.0 Workshop},
  url = {http://www.kde.cs.uni-kassel.de/ws/wbbtmine2008/pdf/all_wbbtmine2008.pdf},
  year = 2008
}

@book{hotho2008challenge,
  editor = {Hotho, Andreas and Benz, Dominik and Jäschke, Robert and Krause, Beate},
  interhash = {fbcdc431904808bb868f09734b91af87},
  intrahash = {1d5d5ef0bb222cb2f3adef4d6b06f1ea},
  publisher = {Workshop at 18th Europ. Conf. on Machine Learning (ECML'08) / 11th Europ. Conf. on Principles and Practice of Knowledge Discovery in Databases (PKDD'08)},
  title = {ECML PKDD Discovery Challenge 2008 (RSDC'08)},
  url = {http://www.kde.cs.uni-kassel.de/ws/rsdc08/pdf/all_rsdc_v2.pdf},
  year = 2008
}