TY - CONF T1 - Analysis of performance of Ultrasonic Local Positioning Systems for 3D Spaces T2 - 2017 International Conference on Indoor Positioning Systems. Y1 - 2017 A1 - K. Mannay A1 - Ureña, J. A1 - Álvaro Hernández A1 - Gualda, D A1 - José Manuel Villadangos JF - 2017 International Conference on Indoor Positioning Systems. VL - 1 ER -