@conference {107, title = {A Proposal for a Navigation System for Autonomous Wheelchairs}, booktitle = {Mechatronics \& Robotics 2004 (MECHROB{\textquoteright}04)}, volume = {2}, year = {2004}, month = {09/2004}, pages = {302 - 307}, address = {Aachen, Alemania}, isbn = {3-938153-50-X}, author = {Garcia, Juan Carlos and Marta Marron and Ure{\~n}a, J.} }