1. Kinesics and Context;Birdwhistell,1970
2. Gesture and Environment;Efrón,1941
3. Universals in human expressive behavior;Eibl-Eibesfeldt,1979
4. Biological and cultural contributions to body and facial movement;Ekman,1977
5. The repertoire of nonverbal behavior categories: origins, usage and coding;Ekman;Semiotica,1969