TY - CONF T1 - Robustness Study of a Multiple Ultrasonic Indoor Location System T2 - Sixth International Conference on Indoor Positioning and Indoor Navigation (IPIN 2015) Y1 - 2015 A1 - Gualda, D A1 - Ureña, J. A1 - JC. García A1 - E. García A1 - FJ. Alvarez JF - Sixth International Conference on Indoor Positioning and Indoor Navigation (IPIN 2015) PB - IEEE CY - Banff (Canadá) SN - 978-1-4673-8401-8 ER -