%0 Journal Article %J IEEE Robotics Automation Magazine %D 2015 %T Toward the Robot Butler: The HUMABOT Challenge [Competitions] %A Enric Cervera %A J. C. Garcia %A P. J. Sanz %B IEEE Robotics Automation Magazine %V 22 %P 8-17 %8 June %G eng %R 10.1109/MRA.2015.2418511