Hatfield, E., L. Bensman, P. D. Thornton, and R. L. Rapson. “New Perspectives on Emotional Contagion: A Review of Classic and Recent Research on Facial Mimicry and Contagion”. Interpersona: An International Journal on Personal Relationships, Vol. 8, no. 2, Dec. 2014, pp. 159-7, doi:10.5964/ijpr.v8i2.162.