GERMANY
Max Planck Institute for Foreign Law and Private International Law, Hamburg (1992, 1994, 1996, 1999, 2002, 2004, 2006, 2007)
ITALY
UNIDROIT, Rome (2002)
LUXEMBURG
Max Planck Institute Luxembourg for International, European and Regulatory Procedural Law (2017)
NETHERLANDS
Hague Academy of International Law, The Hague (2013)
SWITZERLAND
Swiss Institute of Comparative Law, Lausanne (1990, 1998, 2001, 2003, 2005)
UNITED STATES
Columbia University, New York (2000), Organization of American States, Washington DC (1992)
