Spatial Cognition IV. Reasoning, Action, Interaction International Conference Spatial Cognition 2004, Frauenchiemsee, Germany, October 11-13, 2004, Revised Selected Papers - Freksa, Christian; Knauff, Markus; Krieg-Brückner, Bernd; Nebel, Bernhard; Barkowsky, Thomas (Springer Berlin Heidelberg, 2005)