TY - CONF T1 - Testing an Ultrasonic Local Positioning System for 3D Spaces T2 - International Conference on Indoor Positioning and Indoor Navigation (IPIN 2018). Y1 - 2018 A1 - K. Mannay A1 - UreƱa, J. A1 - A. Hernandez A1 - J. M. Villadangos JF - International Conference on Indoor Positioning and Indoor Navigation (IPIN 2018). PB - IPIN CY - Nantes, Francia ER -