@article{KraftHeerRetkowitz2008,
  author    = {Kraft, Bodo and Heer, Thomas and Retkowitz, Daniel},
  title     = {Algorithm and Tool for Ontology Integration Based on Graph Rewriting / Heer, Thomas ; Retkowitz, Daniel ; Kraft, Bodo},
  series = {Applications of Graph Transformations with Industrial Relevance / Third International Symposium, AGTIVE 2007, Kassel, Germany, October 10-12, 2007, Revised Selected and Invited Papers},
  journal   = {Applications of Graph Transformations with Industrial Relevance / Third International Symposium, AGTIVE 2007, Kassel, Germany, October 10-12, 2007, Revised Selected and Invited Papers},
  isbn      = {978-3-540-89019-5},
  pages     = {577 -- 582},
  year      = {2008},
  language  = {en}
}
@article{KraftHeerRetkowitz2008,
  author    = {Kraft, Bodo and Heer, Thomas and Retkowitz, Daniel},
  title     = {Incremental Ontology Integration / Heer, Thomas ; Retkowitz, Daniel ; Kraft, Bodo},
  series = {Proceedings of the 10th International Conference on Enterprise Information Systems : Barcelona, Spain, June 12 - 16, 2008 / organized by INSTICC, Institute for Systems and Technologies of Information, Control and Communication ... [Ed. by Jos{\´e} Cordeiro ...]},
  journal   = {Proceedings of the 10th International Conference on Enterprise Information Systems : Barcelona, Spain, June 12 - 16, 2008 / organized by INSTICC, Institute for Systems and Technologies of Information, Control and Communication ... [Ed. by Jos{\´e} Cordeiro ...]},
  publisher = {INSTICC},
  address   = {Setubal},
  pages     = {13 -- 28},
  year      = {2008},
  language  = {en}
}