1. 1. Abraham, K. Notes on the psycho–analytical investigation and treatment of manic–depressive insanity and allied conditions (1911). Selected Papers on Psycho–Analysis. London: Hogarth Press, 1942, pp. 137–156.
2. Absence of Grief
3. 4. Fenichel, O. The Psychoanalytic Theory of Neurosis. New York: W. W. Norton, 1945, pp. 592–664.
4. 5. Freud, A. & Burlingham, D. War and Children. New York: International Universities Press, 1943, p. 85.