Jochen Renz Reinhold Rauh Markus Knauff Towards Cognitive Adequacy of Topological Spatial Relations. 184-197 2000 conf/spatialCognition/2000 Spatial Cognition http://link.springer.de/link/service/series/0558/bibs/1849/18490184.htm db/conf/spatialCognition/spatialCognition2000.html#RenzRK00