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C. Röhrig, J. Lategahn, M. Müller, and R. Kolibius, “The Application of Real-Time Locating Systems (RTLS) in Security Technology,” in Innosecure: Conference and Exhibition on Innovations in Security Technologies; Velbert. Heiligenhaus, April 22–23, 2015, Aachen: Apprimus Verlag, 2015, pp. 31–39.