Zimmermann, Reinhard MPI for Comparative and International Private Law, Max Planck Society;
Zimmermann, R., & Helmholz, R. (1998). Views of Trust and Treuhand: An Introduction. In R. Helmholz, & R. Zimmermann (Eds.), Itinera Fiduciae: Trust and Treuhand in Historical Perspective (pp. 27-44). Berlin: Duncker & Humblot.