Uladzislau Belavusau is Senior Researcher in European Law at the T.M.C. Asser Institute, University of Amsterdam, the Netherlands.Aleksandra Gliszczynska-Grabias is Professor at the Institute of Law Studies of the Polish Academy of Sciences, Poland.Maria Mälksoo is Professor of International Relations at the University of Copenhagen, Denmark.Angelika Nußerger is Professor at Cologne University, Germany.