Quote
J. Lategahn, M. Müller, and C. Röhrig, "Robust pedestrian localization in indoor environments with an IMU aided TDoA system," in 2014 international conference on indoor positioning and indoor navigation (IPIN 2014) : Busan, South Korea, 27 - 30 October 2014, Piscataway, NJ: IEEE, 2014, pp. 465-472.