@conference {746,
	title = {Estimating bearing angles by encoding ultrasonic transmissions at different frequencies},
	booktitle = {2009 IEEE International Instrumentation and Measurement Technology Conference (I2MTC 2009)},
	year = {2009},
	month = {05/2009},
	pages = {1429-1433},
	author = {{\'A}lvaro Hern{\'a}ndez and Ana Jimenez and I. G{\'o}mez and J.J. Garcia and Mar{\'\i}a del Carmen P{\'e}rez and E. Garc{\'\i}a and Fernando J. {\'A}lvarez}
}
