Katrin S. Lohan, Katharina J. Rohlfing, Karola Pitsch, Joe Saunders, Hagen Lehmann, Chrystopher L. Nehaniv, Kerstin Fischer, Britta Wrede. Tutor Spotter: Proposing a Feature Set and Evaluating It in a Robotic System. I. J. Social Robotics, 4(2):131-146, 2012. [doi]
Abstract is missing.