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4. Ekman, P. (in press). The argument and evidence about universals in facial expressions of emotion. In H. Wagner & A. Manstead (Eds.), Handbook of Psychophysiology: Emotion and Social Behavior. London: John Wiley, Ltd.
5. Ekman, P., Davidson, R., & Friesen, W.V. (under review). Emotional expression and brain physiology II: Duchenne’s smile.