1. Ahmad, M. I., Tariq, H., Saeed, M., Shahid, S., & Krahmer, E. (2011). Guess who? An interactive and entertaining game-like platform for investigating human emotions. In Jacko, J. A. (Ed.), Human-computer interaction. Towards mobile and intelligent interaction environments (Vol. 3, pp. 543–551). Lecture Notes in Computer Science, 6763. Berlin: Springer.
2. Argyle, M., & Cook, M. (1976). Gaze and mutual gaze. Cambridge: Cambridge University Press.
3. Bolinger, D. L. (1989). Intonation and its uses: Melody in grammar and discourse. London: Edward Arnold.
4. Borràs-Comes, J., & Prieto, P. (2011). ‘Seeing tunes’. The role of visual gestures in tune interpretation. Journal of Laboratory Phonology, 2(2), 355–380.
5. Borràs-Comes, J., Puglesi, C., & Prieto, P. (2011). Audiovisual competition in the perception of counter-expectational questions. In Salvi, G., Beskow, J., Engwall, O., & Al Moubayed, S. (Eds.), Proceedings of the 11th international conference on auditory-visual speech processing (pp. 43–46). Volterra, Italy: KTH Royal Institute of Technology.