1. Individual differences in strange situation behavior of one-year-olds;Ainsworth,1971
2. Child Effects on Adults;Bell,1977
3. The nature of the child's tie to his mother;Bowlby;Int. J. Psycho-Anal.,1958
4. Emotional Expression in Infancy [Psychol. Issues, Monogr. 37];Emde,1976
5. Emotional expression in infancy: II;Emde,1978