Marvin, R., Cooper, G., Hoffman, K. & Powell, B. (2002). The Circle of Security™ Project: Attachment-based intervention with caregiver-pre-school child dyads. Attachment & Human Development, Vol. 4, No 1, April 2002, 107-124

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The article above was reprinted in German (2003) as: Das Projekt Kreis der Sicherheit: Bindungsgeleitete Intervention bei Eltern-Kind-Dyaden im Vorschulalter in Scheuerer-English, H., Suess, G. & Pfeifer, W. (Eds) Wege zur Sicherheit.

Cooper, G., Hoffman, K., Powell, B., & Marvin, R (2005) The Circle of Security™ Intervention: Differential Diagnosis and Differential Treatment. In L. Berlin, Y. Ziv & M. Greenberg (Eds). Enhancing Early Attachments. Guilford Press

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J. Cassidy, S.Woodhouse, G. Cooper, K. Hoffman, B. Powell & M. Rodenberg (2005). Examination of the Precursors of Infant Attachment Security: Implications for Early Intervention and Intervention Research In L. Berlin, Y. Ziv & M. Greenberg (Eds). Enhancing Early Attachments. Guilford Press