@Article{Informatik-Spektrum10-Rohrdantz,
  author = {Rohrdantz, C. and Koch, S. and Jochim, C. and Heyer, G. and Scheuermann, G. and Ertl, T. and Schütze, H. and Keim, D.},
  title  = {{Visuelle Textanalyse}},
  year   = {2010}
}