Hopt, Klaus J. MPI for Comparative and International Private Law, Max Planck Society;
https://www.wiso-net.de:443/document/HB__8A59007B-4777-4499-9F41-405331752CDE%7CHBPM__8A59007B-4777-4499-9F41-405331752CDE (全文テキスト(全般))