Inessa Seifert Thomas Barkowsky Christian Freksa Region-Based Representation for Assistance with Spatio-Temporal Planning in Unfamiliar Environments. 179-191 2007 Location Based Services and TeleCartography http://dx.doi.org/10.1007/978-3-540-36728-4_14 series/lngc/2007location db/series/lngc/location2007.html#SeifertBF07