University of Rijeka (Croatia), Masaryk University (Czech Republic), Leibniz University of Hannover (Germany), University of Graz (Austria), University of Maastricht (Netherlands), Mykolas Romeris University (Lithuania), Institute for Comparative Law at the Faculty of Law (Ljubljana), Slovenia, Tallinn University of Technology (Estonia), Law firm Sladič-Zemljak (Slovenia), CEPRIS (Slovenia), Chamber of Notaries of Slovenia (Slovenia).