1. Anderson, K., McOwan, P.W.: A real-time automated system for the recognition of human facial expressions. IEEE Trans. Syst. Man Cybern. Part B (Cybern.) 36(1), 96–105 (2006)
2. Banda, N., Robinson, P.: Noise analysis in audio-visual emotion recognition. In: Proceedings of the International Conference on Multimodal Interaction, pp. 1–4 (2011)
3. Bartlett, M.S., Littlewort, G., Braathen, B., Sejnowski, T.J., Movellan, J.R.: A prototype for automatic recognition of spontaneous facial actions. In: Advances in Neural Information Processing Systems, pp. 1295–1302. MIT (1998, 2003)
4. Berretti, S., Del Bimbo, A., Pala, P., Amor, B.B., Daoudi, M.: A set of selected sift features for 3D facial expression recognition. In: 2010 20th International Conference on Pattern Recognition (ICPR), pp. 4125–4128. IEEE (2010)
5. Chang, Y., Hu, C., Feris, R., Turk, M.: Manifold based analysis of facial expression. Image Vis. Comput. 24(6), 605–614 (2006)