1. Arnold MB (1960) Emotion and personality, vol 1: psychological aspects. Columbia University Press, New York
2. Averill JR (1980) A constructivist view of emotion. In: Plutchik R, Kellerman H (eds) Emotion: theory, research and experience, vol 1. Academic Press, New York, pp 305–339
3. Bell SM, Ainsworth S (1972) Infant crying and maternal responsiveness. Child Dev 43:1171–1190
4. Bowlby J (1969) Attachment. Basic books, New York. Bowlby J (1980) Bindung. Eine Analyse der Mutter-Kind-Beziehung, dt. von Sander G. Kindler, München
5. Bowlby J (1980) Loss. Basic books, New York. Bowlby J (1994) Verlust, Trauer und Depression, dt. von vom Scheidt E. Fischer, Frankfurt a.M.