1. General and interval type-2 fuzzy face-space approach to emotion recognition;Halder;IEEE Transactions on Systems, Man, and Cybernetics: Systems,2013
2. Facial interaction between animated 3d face robot and human beings;Kobayashi,1997
3. Facial Action Coding System;Ekman,1978
4. P. EKMAN, Facial action coding system (facs), A Human Face.
5. Facial expression recognition from line-based caricatures;Gao;IEEE Transactions on Systems, Man, and Cybernetics - Part A: Systems and Humans,2003