@conference {, title = {Fusion of data from ultrasonic LPS and isolated beacons for improving MR navigation}, booktitle = {International Instrumentation and Measurement Technology Conference (I2MTC 2014)}, year = {2014}, month = {05/2014}, pages = {1-4}, publisher = {IEEE}, organization = {IEEE}, address = {Montevideo, Uruguay}, isbn = {978-1-4673-6385-3}, author = {Gualda, D and Ure{\~n}a, J. and JC.Garcia and E. Garcia and FD. ruiz and A. Lindo} }