1. Abboud, B., Davoine, F., & Dang, M. (2004). Facial expression recognition and synthesis based on an appearance model. Signal Processing: Image Communication, 19(8), 723–740.
2. Abdalla, A., Deo, N., & Gupta, P. (2000). Random-tree diameter and the diameter constrained MST. In Congressus Numerantium (pp. 161–182).
3. Baker, S., Matthews, I., & Schneider, J. (2004). Automatic construction of active appearance models as an image coding problem. PAMI, 26(10), 1380–1384.
4. Blanz, V., & Vetter, T. (1999). A morphable model for the synthesis of 3D faces. In SIGGRAPH (pp. 187–194).
5. Brox, T., & Bregler, C. (2009). Large displacement optical flow. In CVPR (pp. 41–48).