Zimmermann, Reinhard MPI for Comparative and International Private Law, Max Planck Society;
https://doi.org/10.3790/978-3-428-49614-3 (Publisher version)
Zimmermann, R., & Helmholz, R. H. (Eds.). (1998). Itinera Fiduciae: Trust and Treuhand in Historical Perspective. Berlin: Duncker & Humblot.