@unpublished{TUW-120808, author = {Retscher, G{\"u}nther}, title = {Research in the Field of Indoor and Pedestrian Navigation at the Research Group Engineering Geodesy at the Vienna University of Technology}, year = {2007}, note = {poster presentation: 24. IUGG General Assembly, Perugia; 2007-07-02 -- 2007-07-13} }