@conference {,
	title = {Coverage Anaylisis of an Ultrasonic Local Positioning System according to the Angle of Inclination of the Beacons Structure.},
	booktitle = {International Conference on Indoor Positioning and Indoor Navigation },
	year = {2019},
	month = {10/2019},
	pages = {1-8},
	publisher = {IPIN},
	organization = {IPIN},
	address = {Pisa, Italia},
	author = {Gualda, D and F. Ciudad and J.J. Garcia and Jimenez, A. and M.C.P{\'e}rez and Ure{\~n}a, J.}
}
