Articles
- ‘The Mutual Assistance Clauses of the North Atlantic and EU Treaties: The Challenge of Hybrid Threats’, (2019) 10 Harvard National Security Journal 405–460
- ‘Reversing a Withdrawal Notification under Article 50 TEU: Can a Member State Change its Mind?’, (2017) 42 European Law Review 451–473
- with Sean Aughey, ‘Targeting and Detention in Non-International Armed Conflict: Serdar Mohammed and the Limits of Human Rights Convergence’, (2015) 91 International Law Studies 60–118
- ‘Untangling Extra-Territorial Jurisdiction from International Responsibility in Jaloud v. Netherlands: Old Problem, New Solutions?’, (2014) 53 Military Law and the Law of War Review 287–318
- ‘UN Peacekeeping Operations and Article 7 ARIO: The Missing Link’, (2012) 9 International Organizations Law Review 77–85
- ‘The Al-Jedda Case before the House of Lords’, (2009) 13 Journal of International Peacekeeping 181–196
- ‘The European Union Status of Forces Agreement (EU SOFA)’, (2008) 13 Journal of Conflict and Security Law 353–391
- ‘Status of Forces and Status of Mission Agreements under the ESDP: The EU’s Evolving Practice’, (2008) 19 European Journal of International Law 67–100
- ‘The Conclusion of International Agreements in the Context of the ESDP’, (2008) 57 International and Comparative Law Quarterly 53–86
- ‘Jurisdiction and International Responsibility in Peace Support Operations: The Behrami and Saramati Cases’, (2008) 8 Human Rights Law Review 151–170
- ‘The EU Status of Forces Agreement: Change and Continuity in the Law of Visiting Forces’, (2007) 46 Military Law and the Law of War Review 9–254
- ‘The Danish Cartoons Row: Re-Drawing the Limits of the Right to Freedom of Expression?’ (2005) 16 Finnish Yearbook of International Law 365–398
Chapters
- ‘Receiving States, Sending States and the Impact of Their Domestic Laws’, in Robin Geiß and Heike Krieger (eds), The Legal Pluriverse Surrounding Multinational Military Operations (OUP, 2020), 373–392
- ‘The Immunities of Visiting Forces’, in Tom Ruys, Nicolas Angelet and Luca Ferro (eds), The Cambridge Handbook of Immunities and International Law (CUP, 2019), 559–576
- ‘Hybrid Law, Complex Battlespaces: What’s the Use of a Law of War Manual?’, in Michael A. Newton (ed), The United States Department of Defense Law of War Manual: Commentary & Critique (CUP, 2019), 403–430
- ‘Hybrid Warfare, Law and the Fulda Gap’, in Christopher Ford and Winston Williams (eds), Complex Battle Spaces (OUP, 2019), 161–190
- with Paul J. Conderman, ‘Jurisdiction’, in Dieter Fleck (ed), The Handbook of the Law of Visiting Forces (2nd, OUP, 2018), 205–260
- ‘Al-Jedda V. United Kingdom, App. No. 27021/08, European Court of Human Rights, 7 July 2011’, in Cedric Ryngaert, Ige F Dekker, Ramses A Wessel and Jan Wouters (eds), Judicial Decisions on the Law of International Organizations (OUP, 2016), 351–360
- ‘The Status of Armed Forces in Public International Law: Jurisdiction and Immunity’, in Alexander Orakhelashvili (ed), Research Handbook on Jurisdiction and Immunities in International Law (Edward Elgar, 2015), 319–371
- ‘The Status of Foreign Armed Forces Deployed in Post-Conflict Environments: A Search for Basic Principles’, in Carsten Stahn, Jennifer S. Easterday and Jens Iverson (eds), Jus Post Bellum (OUP, 2014), 467–501
- with Ramses A. Wessel, ‘International Responsibility for EU Military Operations: Finding the EU’s Place in the Global Accountability Regime’, in Bart van Vooren, Steven Blockmans and Jan Wouters (eds), The EU’s Role in Global Governance: The Legal Dimension (OUP, 2013), 126–141
- ‘Between Legalization and Organizational Development: Explaining the Evolution of EU Competence in the Field of Foreign Policy’, in Paul James Cardwell (ed), EU External Relations Law and Policy in the Post-Lisbon Era (TMC Asser Press, 2012), 59–95
- ‘Autonomy, Attribution and Accountability: Reflections on the Behrami Case’, in Richard Collins and Nigel D. White (eds), International Organisations and the Idea of Autonomy (London, Routledge, 2011), 257–277
- ‘Decisions on Operational Action and Union Positions: Back to the Future?’, in Herman-Josef Blanke and Stelio Mangiameli (eds), The European Union after Lisbon: Constitutional Basis, Economic Order and External Action (Springer, 2011), 533–550
- ‘The Relationship between Community Law and International Law after Kadi: Did the ECJ Slam the Door on Effective Multilateralism?’, in Matthew Happold (ed), International Law in a Multipolar World (London, Routledge, 2011), 303–322
Contributions to commentaries
- Article 28, Article 29 and Article 37, in Herman-Josef Blanke and Stelio Mangiameli (eds), Commentary on the Treaty on European Union (Berlin, Springer, 2013), 981-1016, 1017-1039 and 1131-1145
- Article 26, Article 25 and Article 26 TEU, in H. Smit, P. Herzog, C. Campbell and G. Zagel (eds), Smit and Herzog on The Law of the European Union (Release 13, July 2012) (New York, Matthew Bender, LexisNexis, 2012)
Other publications
- ‘Hybrid Threats and the Law: Concepts, Trends and Implications’, Hybrid CoE Trend Report, April 2020, European Centre for Countering Hybrid Threats
- with Agnieszka Jachec-Neale, ‘International Law in 2050’, Exeter Centre for International Law Occasional Paper 2018/1
- ‘Blurred Lines: Hybrid Threats and the Politics of International Law’, Strategic Analysis, January 2018, European Centre for Countering Hybrid Threats
- Written Evidence on ‘Derogations from the European Convention On Human Rights in Deployed Operations’, in House of Commons Defence Committee, ‘UK Armed Forces Personnel and the Legal Framework for Future Operations’, HC 931 (2014), Ev51–56
- with Ramses A. Wessel (eds), Human Rights in EU Crisis Management Operations: A Duty to Respect and to Protect?, CLEER Working Paper 2012/06
- ‘Normative Power Europe: Status of Forces Agreements in the Field of European Security and Defence Cooperation’, NATO Legal Gazette (July 2012) Issue 28, 2–12
- ‘The NATO SOFA at Sixty: Heading for Retirement or Has Life Just Begun?’, NATO Legal Gazette (April 2012), Issue 27, 2–8
- Written Evidence on ‘Parliamentary Control over the Armed Forces in Germany’, in House of Lords Constitution Committee, ‘Waging War: Parliament’s Role and Responsibility’, HL 236-II (2006), 218–223