J.  Movellan, Eckhardt, M., Virnes, M., and Rodriguez, A., ?Sociable robot improves toddler vocabulary skills?, in 2009 4th ACM/IEEE International Conference on Human-Robot Interaction (HRI), La Jolla, CA, 2009.

J.  Whitehill, Littlewort, G., Fasel, I., Bartlett, M., and Movellan, J., ?Toward Practical Smile Detection?, IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 31, no. 11, pp. 2106-2111, 2009.