Helmut Philipp Aust is a Professor of Law at Freie Universität Berlin, Germany, and Co-Chair of the ILA Study Group 'The Role of Cities in International Law'. Publications include Complicity and the Law of State Responsibility (2011) and The Interpretation of International Law by Domestic Courts (2016, with Georg Nolte).
Thomas Kleinlein is a Professor of Law at Friedrich Schiller University Jena, Germany, where he holds the Chair of Public Law, Public International Law, EU Law and Comparative Law and is Co-Director of the Center for European Studies. Publications include System, Order, and International Law - The Early History of International Legal Thought (2017, with Stefan Kadelbach and David Roth-Isigkeit).
