‘Institutions under Stress: Covid-19, Anti-Internationalism and the Futures of Global Governance’, Global Challenges, Special Issue no. 1, June 2020 here

‘Un año desde el dictamen del WGAD sobre el caso de los presos políticos catalanes’, La Vanguardia, 5 June 2020 (with Neus Torbisco Casals and Ralph Bunche) here

‘COVID, Crisis and Change in Global Governance’, the global and Verfassungsblog, 17 April 2020 here and here

‘Institutionalizing Subsidiarity in the Reform of Investment Adjudication’, the global, 27 January 2020 here

‘Law and Polity: Contingency, Fiction, Loss’, 16 International Journal of Constitutional Law 1223-1231 (2018) Abstract and full text

‘Menschenrechte im Katalonienkonflikt’, FAZ Einspruch, 31 March 2018 Full text (paywall)

‘The Spanish Constitutional Crisis: Law, Legitimacy and Popular Sovereignty in Question’, Verfassungsblog, 7 October 2017 Full text

‘Coexistence, Cooperation, Conflict: What Role for International Law?’, Harvard International Law Journal Online Symposium, 4 August 2017 Full text

‘Capitulation in The Hague: The Marshall Islands Cases’, EJILTalk!, 10 October 2016 Full text

‘Accountability in Global Governance: Europe as Laboratory, Vanguard, or Obstacle?’, The Globe: The Graduate Institute Review, Spring 2016, 24-25   Full text

‘When Does International Law Work?’, The Globe: The Graduate Institute Review, Spring 2015, 14-15   Full text

‘The Backlash against International Courts’, Verfassungsblog and Völkerrechtsblog, 16 December 2014   Full text here and here

‘Using Spanish law to block Catalonia’s independence consultation may simply encourage Catalans to construct their own ‘alternative legality’’, LSE EUROPP Blog on European Politics and Policy, 4 November 2014   Full text

‘The Path of Judicialization: A Comment on Karen Alter’s The New Terrain of International Law’, EJILTalk!, 23 April 2014   Full text

‘Crimea and the Limits of International Law’, EJILTalk!, 10 March 2014   Full text

‘Constitutionalism and Pluralism: A Reply to Alec Stone Sweet’, International Journal of Constitutional Law 11 (2013), 501-505   Extract and full text

‘Catalonia’s Independence: A Reply to Joseph Weiler’, EJILTalk!, 18 January 2013   Full text

‘Pluralism’s Promise’, Opinio Juris, 6 July 2012   Full text

‘Book Review: Jutta Brunnée & Stephen J. Toope, Legitimacy and Legality in International Law’, 106 American Journal of International Law (2012), 203-209   Full text

‘Informal Reform in the Security Council’, in International Law Association United Nations Reform Study Group, United Nations Reform through Practice (December 2011), 42-47   Abstract and full text

‘The Dream of Reason: A Response to Mattias Kumm’, EJIL:Talk!, 16 December 2009   Full text

‘Book Review: Lailach, Martin: Die Wahrung des Weltfriedens und der internationalen Sicherheit als Aufgabe des Sicherheitsrates der Vereinten Nationen’, 58 Zeitschrift für ausländisches öffentliches Recht und Völkerrecht 1100-1103 (1998)   Full text