@article{ChiarcosDipperGoetzeetal.2008,
  author    = {Christian Chiarcos and Stefanie Dipper and Michael G{\"o}tze and Ulf Leser and Anke L{\"u}deling and Julia Ritz and Manfred Stede},
  title     = {A flexible framework for integrating annotations from different tools and tag sets},
  url       = {http://www.atala.org/A-Flexible-Framework-for},
  year      = {2008},
}