@Article{mccallum2007topic,
  author = {McCallum, A. and Wang, X. and Corrada-Emmanuel, A.},
  title  = {Topic and role discovery in social networks with experiments on enron and academic email},
  journal = {Journal of Artificial Intelligence Research},
  year   = {2007},
  number = {},
  url    = {http://scholar.google.de/scholar.bib?q=info:GVi_TXpyWz8J:scholar.google.com/&output=citation&hl=de&ct=citation&cd=0},

  const  = {\ text}
}