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Larsen, R.; Kasimatis, M.; Frey, K. (1992). "Facilitating the Furrowed Brow: An Unobtrusive Test of the Facial Feedback Hypothesis Applied to Unpleasant Affect". Cognition & Emotion. 6 (5): 321–338. doi:10.1080/02699939208409689. PMID29022461.
Smith, Craig A. (Mar 1989). "Dimensions of appraisal and physiological response in emotion". Journal of Personality and Social Psychology. 56 (3): 339–353. doi:10.1037/0022-3514.56.3.339. PMID2926633.
Ambady, Nalini; Rosenthal, R. (1993). "Half a Minute: Predicting Teacher Evaluations From Thin Slices of Nonverbal Behavior and Physical Attractiveness". Journal of Personality and Social Psychology. 64 (3): 431–441. doi:10.1037/0022-3514.64.3.431. S2CID16122351.