@conference {Ferr_RIE17,
	title = {Design of robot teaching assistants through multi-modal human-robot interactions.},
	booktitle = {Proc. of International Conference on Robotics in Education (RiE)},
	year = {2017},
	author = {P. Ferrarelli and M. T. L{\'a}zaro and L. Iocchi}
}
