Lessons Learned in a Ball Fetch-And-Carry Robotic Competition - Lodi Rizzini, Dario; Caselli, Stefano; Valeriani, Davide; Signifredi, Andrea; Salsi, Isabella; Patander, Marco; Parisi, Federico; Costalunga, Alessandro; Cigolini, Marco (Journal of Automation, Mobile Robotics and Intelligent Systems, 2014)