@conference {, title = {A review of techniques for ultrasonic indoor localization systems}, booktitle = {The Journal of Acoustical Society of America}, volume = {145}, year = {2019}, month = {03/2019}, pages = {1884-1884}, address = {EEUU}, doi = {https://doi.org/10.1121/1.5101825}, author = {J.Aparicio and F.J. Alvarez and A. Hernandez and S. Holm} }