Berry Claus Klaus Eyferth Carsten Gips Robin Hörnig Ute Schmid Sylvia Wiebrock Fritz Wysotzki Reference Frames for Spatial Inference in Text Understanding. 241-266 1998 conf/spatialCognition/1998 Spatial Cognition http://link.springer.de/link/service/series/0558/bibs/1404/14040241.htm db/conf/spatialCognition/spatialCognition1998.html#ClausEGHSWW98