@conference {212,
	title = {Relative positioning system using simultaneous round trip time of flight measurements.},
	booktitle = {11th IEEE Int. Conf. on Emergy Technologies and Factory Automation (ETFA 2006)},
	year = {2006},
	month = {09/2006},
	pages = {602 - 605},
	address = {Praga, Rep{\'u}blica Checa},
	isbn = {1-4244-0881-1},
	author = {Carlos De Marzziani and Ure{\~n}a, J. and Manuel Mazo and {\'A}lvaro Hern{\'a}ndez and J.J. Garcia and Ana Jimenez and Mar{\'\i}a del Carmen Perez and Alberto Ochoa and Jos{\'e} Manuel Villadangos}
}
