Gerald Gruber Christian Menard Bernhard Schachinger Evaluation of the Geometric Accuracy of Automatically Recorded 3D - City Models Compared to GIS-Data. 67-78 2008 AGILE Conf. http://dx.doi.org/10.1007/978-3-540-78946-8_4 conf/agile/2008 db/conf/agile/agile2008.html#GruberMS08