Hopt, Klaus J. MPI for Comparative and International Private Law, Max Planck Society;
Hopt, K. J. (2007). Weiterentwicklung der Corporate Governance in Europa (Further Developments of Corporate Governance in Europe). In Einblicke-Ausblicke, SWXGroup Swiss Stock Exchange Services (pp. 8-11). German, English and French versions, Zürich: Geschäftsbericht 2006.