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J. Lategahn, T. Ax, and C. Röhrig, "Multi hypothesis Kalman filter for indoor pedestrian navigation based on topological maps," in Proceedings of the 2016 IEEE/ION Position, Location and Navigation Symposium : PLANS : April 11-14, 2016, Hyatt Regency, Savannah, Georgia, Piscataway, NJ: IEEE, 2016, pp. 607-612.