New Zealand's Policy of Implied Recognition of States: One Step Ahead or Falling Behind?, New Zealand Yearbook of International Law 2009 (2010), 18 pp.

Security Council Treaty Action, Revue Hellénique de Droit International, 62 (2009), pp. 65-116. more>>

Adaptation of Treaties by the Security Council and the Rule of Law, ASIL Proceedings, 103 (2009), 4 pp.

Participation of UN Member States in the Work of the Organization: A Multicultural Alternative to Present-Day Regionalism?, in: Sienho Yee/Jacques-Yvan Morin (eds.), Multiculturalism and International Law: Essays in Honour of Edward McWhinney (Leiden: Brill, 2009), pp. 239-275. more>>

ITLOS - International Tribunal for the Law of the Sea, in: Helmut Volger (ed.), A Concise Encyclopedia of the United Nations (2nd edn., Leiden: Martinus Nijhoff, 2009), pp. 449-459.
 

Membership and Representation of States, in: Helmut Volger (ed.), A Concise Encyclopedia of the United Nations (2nd edn., Leiden: Martinus Nijhoff, 2009), pp. 480-486.
 

Law of the Sea, in: Helmut Volger (ed.), A Concise Encyclopedia of the United Nations (2nd edn., Leiden: Martinus NIjhoff, 2009), pp. 466-477.
 

Internationales Recht und die Zukunft des Multilateralimus [International Law and the Future of Multilateralism], epd Dokumentation Nr. 19/20, 29. April 2008, pp. 27-35.  more>>

A Plurality of Responsible Actors: International Responsibility for the Acts of the Coalition Provisional Authority in Iraq, in: Phil Shiner/Andrew Williams (eds.),  The Iraq War and International Law (Oxford: Hart Publishing, 2008), pp. 185-230. more>>

Der Anti-Terror-Kampf der USA und die Grundrechte [The US War on Terrorism and German Constitutional Basic Rights], in: Axel Kämmerer (ed.), An den Grenzen des Staats (Berlin: Duncker & Humblot, 2008), pp. 75-100. more>>

Keywords on: Alien Tort Claims Act, Piracy, Recognition of States and Governments, Ships, in: Peter Cane/Joanne Conaghan (eds.), The New Oxford Companion to Law (Oxford: Oxford University Press, 2008).

The EU-Turkey Controversy over Cyprus or a Tale of Two Declarations, Chinese Journal of International Law 5 (2006), pp. 579-616. more >>

Chypre: écueil pour la Turquie sur la voie de l`Europe, Annuaire français de droit international 51 (2005), pp. 85-119.

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Diplomacy Under Occupation: The Status of Diplomatic Missions in Occupied Iraq, Anuario Mexicano de Derecho Internacional, 6 (2006), pp. 461-511. more >>

Article 23, in: Andreas Zimmermann/ Christian Tomuschat/Karin Oellers-Frahm (eds.), Commentary on the Statute of the International Court of Justice (Oxford: Oxford University Press, 2006), pp. 399-415. more >>
 

Article 43 in: Andreas Zimmermann/ Christian Tomuschat/Karin Oellers-Frahm (eds.), Commentary on the Statute of the International Court of Justice (Oxford: Oxford University Press, 2006), pp. 977-1038. more >>
 

The Duty Not to  ‘Recognize as Lawful’ a Situation Created by the Illegal Use of Force or Other Serious Breaches of a Jus Cogens Obligation: An Obligation Without Real Substance?, in: Christian Tomuschat and Jean-Marc Thouvenin (eds.), The Fundamental Rules of the International Legal Order. Jus Cogens and Obligations Erga Omnes (Leiden: Martinus Nijhoff, 2005), pp. 99-125. more >>

The Security Council as World Legislature, American Journal of International Law, 99 (2005), pp. 175-193. more >>
 

Changing Views on the Use of Force: The German Position, Baltic Yearbook of International Law, 5 (2005), pp. 41-76. more >>
 

Luftverkehr mit nicht anerkannten Staaten: Der Fall Nordzypern [Air Traffic with Non-Recognized States: The Case of Northern Cyprus], Archiv des Völkerrechts [Public International Law Archive], 43 (2005), pp. 1-42. English translation by FCO >>
 

The Constitutive versus the Declaratory Doctrine of Recognition: Tertium Non Datur?, British Year Book of International Law 75 (2004) [2005], pp. 101-181. more >>
 

Responsibility of International Organizations: Does the European Community Require Special Treatment?, in: Maurizio Ragazzi (ed.), International Responsibility Today. Essays in Memory of Oscar Schachter (Leiden: Martinus Nijhoff, 2005), pp. 405-421. more >>

Impediments to Peacekeeping: The Case of Cyprus, International Peacekeeping: The Yearbook of International Peace Operations 8 (2004), pp. 33-63. more >>
 

The Legal Character of Statements by the President of the Security Council, Chinese Journal of International Law, 2 (2003), pp. 419-467. more >>
 

Grenzen der ‘Grenzenlosen Gerechtigkeit’. Die völkerrechtlichen Grenzen der Bekämpfung des internationalen Terrorismus nach dem 11. September 2001 [How Infinite Is ‘Infinite Justice’. Legal Limits of the Fight Against International Terrorism after September 11, 2001], in: Wolfgang März (ed.), An den Grenzen des Rechts [Law at Its Limits] (Berlin: Duncker & Humblot, 2003), pp. 101-183.
 

Ende des Föderalismus. Gleichschaltung und Entstaatlichung der deutschen Länder von der nationalsozialistischen Machtergreifung bis zur Auflösung des Reichsrats [End of Federalism. The Bringing Into Line and Liquidation of the German Federal States from the National Socialist Seizure of Power to the Abolition of the Reichsrat], Zeitschrift für Neuere Rechtsgeschichte [Journal of Contemporary Legal History], 24 (2002), pp. 112-155.
 

Das deutsche Kolonialverfassungsrecht vor dem Internationalen Gerichtshof [The Constitutional Law of the German Colonies Before the International Court of Justice], Archiv des Völkerrechts [Public International Law Archive], 40/1 (2002), pp. 17-53.
 

ITLOS - International Tribunal for the Law of the Sea, in: Helmut Volger (ed.), A Concise Encyclopedia of the United Nations (The Hague: Kluwer, 2002), pp. 340-349.
 

Membership and Representation of States, in: Helmut Volger (ed.), A Concise Encyclopedia of the United Nations (The Hague: Kluwer, 2002), pp. 369-373.
 

Law of the Sea, in: Helmut Volger (ed.), A Concise Encyclopedia of the United Nations (The Hague: Kluwer, 2002), pp. 356-366.
 

Der Internationale Seegerichtshof in Hamburg als Mittel der friedlichen Beilegung seerechtlicher Streitigkeiten [The International Tribunal for the Law of the Sea as a Means for the Pacific Settlement of Law of the Sea Disputes], Juristische Schulung [Legal Training], 41 (2001) pp. 550-556.
 

The Cyprus Question Before the European Court of Justice, European Journal of International Law, 12 (2001), pp. 727-750. more >>
 

Who is a Legitimate Government in Exile? Towards Normative Criteria for Governmental Legitimacy in International Law, in: Guy S. Goodwin-Gill/Stefan Talmon (eds.), The Reality of International Law. Essays in Honour of Ian Brownlie (Oxford: Clarendon Press, 1999), pp. 499-537.
 

ITLOS - Internationaler Seegerichtshof, in: Helmut Volger (ed.), Lexikon der Vereinten Nationen (Munich: Oldenbourg Verlag, 1999), pp. 285-294.
 

Mitgliedschaft/Repräsentation von Staaten, in: Helmut Volger (ed.), Lexikon der Vereinten Nationen (Munich: Oldenbourg Verlag, 1999), pp. 393-397.
 

Seerecht, in: Helmut Volger (ed.), Lexikon der Vereinten Nationen (Munich: Oldenbourg Verlag, 1999), pp. 455-466.
 

Die Geltung deutscher Rechtsvorschriften bei Auslandseinsätzen der Bundeswehr mit Zustimmung des Aufenthaltsstaates [The Applicability of German Laws to German Troops Stationed Abroad with the Consent of the Host State], Neue Zeitschrift für Wehrrecht [New Journal of Military Law], 39 (1997), pp. 221-236.
 

The Legal Effects of (Non) Recognition: The Case of the Turkish Republic of Northern Cyprus, in: Malcolm Evans (ed.), Aspects of Statehood and Institutionalism in Contemporary Europe (Aldershot: Dartmouth, 1997), pp. 57-81.
 

War Booty of ‘Separate Entity’ Protected by Sovereign Immunity, Oxford Journal of Legal Studies, 15 (1995), pp. 295-307. more>>
 

Recognition of Governments: An Analysis of the New British Policy and Practice, British Year Book of International Law, 63 (1992), pp. 231-297.
 

The Radbruch Formula: Legal Injustice and Supra-legal Justice, ELSA Law Review, 2 (1991), pp. 17-30.
 

LL.M. Studium an der University of Cambridge (Wolfson College) nicht nur für Referendare [LL.M. Studies at Cambridge University (Wolfson College) not only for Graduates], Juristische Schulung [Legal Training], 31 (1991), pp. 522-524.