Ekman, P. ; Friesen, W.; Ellsworth, P. 1972 Emotion in the human face: guidelines for research and an integration of findings. New York, Pergamon Press.
2.
Emde, R. N.1983“The prerepresentational self and its affective core” , The psychoanalytic study of the child38: 165-192.
3.
Emde, R.N. ; Gaensbauer, T.; Harmon, R.J.1976“Emotional expression in infancy: a biobehavioral study”, Psychological Issues10 (37).
4.
Emde, R.N. ; Izard, C.; Huebner, R.; Sorce, J.; Klinnert, M.D.1985“Adult judgments of infant emotions: replication studies within and across laboratories”, Infant Behavior and Development8 (1): 79-88.
5.
Emde, R.N. ; Kligman, D.H.; Reich, J.H.: Wade, T. 1978 “Emotional expression in infancy: I. Initial studies of social signaling and an emergent model”, in: M. Lewis and L. Rosenblum (eds) The development of affect, New York, Plenum.
6.
Freud, S. 1959 “Inhibitions, symptoms, and anxiety”, Vol. 22, pp. 77-172 of: J. Strachey (eds. and transl.), The standard edition of the complete psychological works of Sigmund Freud. London, Hogarth Press (first ed. 1926).
7.
Hiatt, S. ; Campos, J.; Emde, R.N.1979“Facial patterning and infant emotional expression: happiness, surprise, fear”, Child Development50 (4): 1020-1035.
8.
Izard, C. 1971 The face of emotion. New York, Meredith and Appleton-Century Crofts.
9.
Izard, C. ; Huebner, R.; Risser, D.; McGinnes, G.C.; Dougherty, L.1980“The young infant's ability to produce discrete emotional expressions”, Developmental Psychology16 (2): 132-140.
10.
Klinnert, M.D. ; Campos, J.; Sorce, J.; Emde, R.N.; Svejda, M. 1982 “The development of social referencing in infancy”, in: R. Plutchik and H. Kellerman (eds) Emotions in early development. Vol. 2 of Emotion: theory, research and experience, New York, Academic Press.