@Article{cattuto2007network,
  author = {Cattuto, Ciro and Schmitz, Christoph and Baldassarri, Andrea and Servedio, Vito D. P. and Loreto, Vittorio and Hotho, Andreas and Grahl, Miranda and Stumme, Gerd},
  title  = {Network Properties of Folksonomies},
  journal = {AI Communications Journal, Special Issue on ``Network Analysis in Natural Sciences and Engineering''},
  year   = {2007},
  number = {4},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2007/cattuto2007network.pdf},

  const  = {\ text}
}