@conference {,
	title = {Flexible Ultrasonic Beacon Unit Based on SoC for Local Positioning Systems},
	booktitle = {Sixth International Conference on Indoor Positioning and Indoor Navigation (IPIN 2015)},
	year = {2015},
	month = {10/2015},
	pages = {1-4},
	publisher = {IEEE},
	organization = {IEEE},
	address = {Banff (Canad{\'a})},
	isbn = {978-1-4673-8401-8},
	author = {{\'A}lvaro Hern{\'a}ndez and E. Garc{\'\i}a and Gualda, D and Jos{\'e} Manuel Villadangos and Mar{\'\i}a del Carmen P{\'e}rez and Gutierrez, R. and Ure{\~n}a, J. and F. Nombela}
}
