@inproceedings{Richter:et:al:fg02,
  author	= {Richter, Frank and Ovchinnikova, Ekaterina and Trawi{\'n}ski, Beata and Meurers, W. Detmar},
  editor	= {J{\"a}ger, Gerhard and Monachesi, Paola and Penn, Gerald and Wintner, Shuly},
  title		= {Interactive Graphical Software for Teaching the Formal Foundations of Head-Driven Phrase Structure Grammar},
  booktitle	= {Proceedings of Formal Grammar 2002},
  pages		= {137--148},
  year		= {2002},
  URL		= {http://www.sfs.uni-tuebingen.de/~fr/cards/fg02rotm.html}
}