1. The perception of people;Bruner,1954
2. The Model Method In Facial Recognition. Tech. Rep. Pri:15;Bledsoe,1964
3. The expression of the emotions;Darwin,1972
4. Charles Darwin’s The Expression Of The Emotions In Man And Animals, Third Edition, With Introduction, Afterwords And Commentaries By Paul Ekman,1998
5. Personal identification and description;Galton;Nature,1888