Greenspan, S.I. (1989). The Development of the Ego: Implications for Personality Theory, Psychopathology and the Psychotherapeutic Process.Madison, CT: Int. Univ. Press.
2.
Volkan, V.D. (1981). Linking Objects and Linking Phenomena: A Study of the Forms, Symptoms, Metapsychology, and Therapy of Complicated Mourning.New York: Int. Univ. Press.