@InProceedings{Sattler-KI-96,
  author = 	 {Sattler, U.},
  title = 	 {A Concept Language Extended
with Different Kinds of Transitive Roles},
  booktitle = {20. Deutsche Jahrestagung f{\"ur} K{\"u}nstliche Intelligenz},
  series = {Lecture Notes in Artificial Intelligence},
  number = 1137,
  editor = {G{\"o}rz, G. and H{\"o}lldobler, S.},
  publisher = {Springer Verlag},
  year = 1996,
}