1. Greenspan SI (1989) The Development of the Ego: Implications for Personality Theory, Psychopathology, and the Psychotherapeutic Process. Madison, CT: International Universities Press, USA.
2. Greenspan SI (1992) Infancy and Early Childhood: The practice of clinical assessment and intervention with emotional and developmental challenges. International Universities Press, Madison, Conn, USA.
3. Zero to Three (1994) Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood. Arlington, VA: National Center for Clinical Infant Programs, USA.
4. Zimmermann BJ (2005) Chapter 2. Attaining self-regulation: A Social Cognitive Perspective. In: Boekaerts, et al. (Eds.), Handbook of self-regulation, New York: Academic Press, USA, pp. 13-41.
5. Thelen E (1989) Self-organization in developmental processes: Can systems approaches work? In: Gunnar (Edr.), Systems in development: The Minnesota Symposium in Child Psychology, pp. 77-117.