T. Wiltschko, V. Schwieger, and W. Möhlenbrink. 6th European Congress and Exhibition on Intelligent Transport Systems and Services. Aalborg, Denmark, 18-20 June, (2007)
K. Ramm, and V. Schwieger. Journal of location based services, 2007 - Taylor & Francis, 1 (2):
133-144(2007)5th International Symposium on Mobile Mapping Technology, Padua, Italy, 28–31, May 2007.