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S. Spieker, C. Röhrig, and M. Müller, “Tracking of Driverless Transport Vehicles Using Wireless Sensor Networks and an Extended Kalman Filter,” in Proceedings of the 5th GI/ITG KuVS Symposium on Location-Based Applications and Services, Nuremberg: Special Edition of the Georg Simon Ohm University of Nuremberg Series, 2008, pp. 65–70.