1. Winnicott DW.Home is Where We Start From: Essays by a Psychoanalyst. Harmondsworth: Penguin Books, 1986:13.
2. Piaget J.Genetic Epistemology. New York: Columbia University Press, 1973.
3. Uexhüll Th. von. Freud, die Psychoanalyse und das psychosomatische Problem.Psyche 1990;44:445?458.
4. Freud S. Formulations on the two principles of mental functioning (1911). In: Freud S.The Standard Edition of the Complete Psychological Works of Sigmund Freud 12. London: The Hogarth Press, 1958:213?226.
5. Ibid: 213