Alexandra Musto Klaus Stein Andreas Eisenkolb Thomas Röfer Wilfried Brauer Kerstin Schill From Motion Observation to Qualitative Motion Representation. 115-126 2000 conf/spatialCognition/2000 Spatial Cognition http://link.springer.de/link/service/series/0558/bibs/1849/18490115.htm db/conf/spatialCognition/spatialCognition2000.html#MustoSERBS00