References

For more information about Paul Ekman's research:

Ekman, P. (1973). Darwin and facial expression. New York: Academic Press.

Ekman, P., & Friesen, W. V. (1975). Unmasking the face. Englewood Cliffs,NJ: Prentice-Hall.

Ekman, P., et al. (1992). Universal and cultural differences in the judgments of facial expressions of emotion. Journal of Personality and Social Psychology, 53, 712-717.

Ekman, P. (1992). Are there basic emotions? Psychological Review, 99, 550-553.

For other information about facial expressions and emotion:

Eibl-Eibesfeldt, I. (1971). Love and hate: The natural history of behavior patterns. New York: Holt, Rinehart & Winston.

Izard, C. E. (1975). Facial expressions and the regulation of emotions. Journal of Personality and Social Psychology, 58, 487-498.

Izard, C. E. (1977). Human emotions. New York: Plenum Press.

Levenson, R. W., Ekman, P., Heider, K., & Friesen, W. V. (1992). Emotion and autonomic nervous system activity in the Minangkabau of West Sumatra. Journal of Personality and Social Psychology, 62, 972-988.