@Article{Atzmueller:12c,
  author = {Atzmueller, Martin},
  title  = {Mining Social Media: Key Players, Sentiments, and Communities},
  journal = {WIREs: Data Mining and Knowledge Discovery},
  year   = {2012},
  number = {},
  url    = {},

  const  = {\ text}
}
@Misc{noack08modularity,
  author = {Noack, Andreas},
  title  = {Modularity clustering is force-directed layout},

  year   = {2008},
  number = {},
  url    = {http://www.citebase.org/abstract?id=oai:arXiv.org:0807.4052},

  const  = {\ text}
}
@Misc{tyler2003email,
  author = {Tyler, Joshua R and Wilkinson, Dennis M and Huberman, Bernardo A},
  title  = {Email as Spectroscopy: Automated Discovery of Community Structure   within Organizations},

  year   = {2003},
  number = {},
  url    = {http://www.citebase.org/cgi-bin/citations?id=oai:arXiv.org:cond-mat/0303264},

  const  = {\ text}
}