@conference {,
	title = {Extensive Ultrasonic Local Positioning System for navigating with mobile robots},
	booktitle = {2013 10th Workshop on Positioning, Navigation and Communication (WPNC) },
	volume = {1},
	year = {2013},
	month = {10/2013},
	pages = {1-6},
	publisher = {IEEE},
	organization = {IEEE},
	chapter = {1},
	address = {Dresden (Alemania},
	isbn = {978-1-4673-60333-3},
	author = {F. D. Ru{\'\i}z and J.C. Garc{\'\i}a and E. Garc{\'\i}a and Ure{\~n}a, J. and D. de Digeo and Gualda, D}
}
