@Inproceedings{Brandes07Role,
  author = {Brandes, Ulrik and Lerner, Jürgen},
  title  = {Role-equivalent Actors in Networks},

  year   = {2007},
  number = {},
  url    = {http://www.inf.uni-konstanz.de/algo/publications/bl-rean-07.pdf},

  const  = {\ text}
}
@Inproceedings{conf/isaac/BrandesL04,
  author = {Brandes, Ulrik and Lerner, Jürgen},
  title  = {Structural Similarity in Graphs (A Relaxation Approach for Role Assignment).},

  year   = {2004},
  number = {},
  url    = {http://kops.ub.uni-konstanz.de/volltexte/2009/7777/},

  const  = {\ text}
}