@Book{berendt2008challenge,

  title  = {Wikis, Blogs, Bookmarking Tools - Mining the Web 2.0 Workshop},

  year   = {2008},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/ws/wbbtmine2008/pdf/all_wbbtmine2008.pdf},

  const  = {\ text}
}