Karl Rehrl Sven Leitinger Georg Gartner Felix Ortag An Analysis of Direction and Motion Concepts in Verbal Descriptions of Route Choices. 471-488 2009 COSIT http://dx.doi.org/10.1007/978-3-642-03832-7_29 conf/cosit/2009 db/conf/cosit/cosit2009.html#RehrlLGO09