8Bartlett, M. S., Littlewort, G. C., & Frank M. G. et al. (2006). Automatic Recognition of Facial Actions in Spontaneous Expressions[J].Journal of Multimedia, 1 (6): 22-35.
9Bashyal, S., & Venayagamoorthy, G.(2008). Recogni- tion of Facial Expression Using Gabor Wavelets and Learning Vector Quantization[J]. Engineering Applications of Artificial Intelligence, 21 (7): 1056-1064.
10Cheon, Y., & Kim, D. (2009). Natural Facial Expres- sion Recognition Using Differential-AAM and Manifold Learn- ing[J].Pattern Recognition, (42): 1340- 1 350.
