Butler, G 2025, Deciding Not to Decide: Dismissal, Narrowing, and Relinquishment at the Court of Justice of the European Union. in A. Loxa & L. Lonardo (eds), Normative Assessment of the ECJ Reasoning.
Butler, G 2025, Research, Knowledge, Science, and Education. in J. Odermatt & R.A. Wessel (eds), Research Handbook on EU Law and Global Challenges, Edward Elgar Publishing: Cheltenham.
Butler, G 2025, ‘The Legal Relations of the European Union with the Principality of Andorra’ European Foreign Affairs Review, vol. 30.
Butler, G 2025, Charlemagne. in I. Dale (ed), The Generals, Hodder & Stoughton/Hachette: London
Butler, G 2024, ‘Solidarity on Trial: On Reliance, Reason, and Logic at the Court of Justice of the EU’ Maastricht Journal of European and Comparative Law, vol. 31.
Butler, G & Krunke, H (eds) 2024, Nordic Cooperation and the European Union: 50 Years of Legal Integration, Hart Publishing/Bloomsbury: Oxford.
Butler, G 2024, Nordic-EU Legal Integration: The Ins and the Outs. in G. Butler & H. Krunke (eds), Nordic Cooperation and the European Union: 50 Years of Legal Integration, Hart Publishing/Bloomsbury: Oxford.
Butler, G 2024, Actors in EU External Relations. in A. Biondi, O Stefan & A Carrozzini (eds) Elgar Encyclopedia of EU Law. Edward Elgar Publishing, Cheltenham.
Butler, G 2024, ‘Pant- og retursystem: prisfastsættelse, grænseoverskridende handel og privat eksport inden for EU’s indre marked’ EU-ret og Menneskeret, vol. 31. no. 2.
Butler, G 2024, Fisheries. in F. Fabbrini (ed), The Law and Politics of Brexit: Volume V: The EU-UK Trade and Cooperation Agreement, Oxford University Press: Oxford.
Butler, G 2024, An Advocate before Advocate General: Eleanor Sharpston at the European Courts. in C. Barnard, A. Lazowski, D. Sarmiento, (eds), The Pursuit of Legal Harmony in a Turbulent Europe: Essays in Honour of Eleanor Sharpston, Hart Publishing/Bloomsbury: Oxford. ISBN (Print): 9781509977000 (978-1-509-97700-0). ISBN (Electronic): 9781509977017 (978-1-509-97701-7), 9781509977024 (978-1-509-97702-4).
Butler, G, 2024 ‘The Legal Relations of the European Union with the Republic of San Marino’ European Foreign Affairs Review, vol. 29.
Butler, G 2024, Reform of the Judicial Architecture of the EFTA Pillar of the EEA. in P. Hreinsson, O.J. Einarsson, & B Pálmarsdóttir (eds), The EFTA Court and the EEA: 30 Years On, Hart Publishing/Bloomsbury: Oxford. ISBN (Print): 9781509968800 (978-1-509-96880-0).
Cotter, J & Butler, G 2024 ‘The President of the European Commission and the Power to Request a Commissioner’s Resignation’ Common Market Law Review, vol. 60. no. 3.
Butler, G (ed) 2024, Research Handbook on EEA Internal Market Law, Research Handbooks in European Law, Edward Elgar Publishing: Cheltenham.
Butler, G 2024, Intellectual Property. in G. Butler (ed), Research Handbook on EEA Internal Market Law, Research Handbooks in European Law, Edward Elgar Publishing: Cheltenham.
Butler, G 2024, The EEA Agreement: On Thirty Years of an Extended Internal Market. in G. Butler (ed), Research Handbook on EEA Internal Market Law, Research Handbooks in European Law, Edward Elgar Publishing: Cheltenham.
Butler, G 2023, Free Movement of Capital: General Rules and Exceptions. in R. Schütze & T. Tridimas (eds), Oxford Principles of European Union Law: Volume II: The Internal Market, Oxford University Press: Oxford.
Butler, G 2023, ‘The Administrative Tribunal of the European Stability Mechanism: ESMAT at 10’.
Butler, G 2023, ‘Jurisdiction of the EU Courts in the Common Foreign and Security Policy: Reflections on the Opinions of AG Ćapeta in KS and KD, and Neves 77 Solutions’, EU Law Live, 26 November 2023.
Butler, G 2023, EU Regulations in the National Legal Order in A. Lazowski & A Sikora (eds), EU Regulations in Practice: Legislative and Judicial Approaches, Hart Publishing/Bloomsbury: Oxford.
Butler, G 2023, State Monopolies of a Commercial Character. in S. Garben & L. Gormley (eds), Oxford Encyclopedia of EU Law. Oxford University Press, Oxford. ISBN: 9780191877025 (978-01-91877-02-5).
Butler, G 2023, Screening of Foreign Direct Investment and the Common Commercial Policy. in X. Groussot, M.-L. Öberg, & G. Butler (eds), The EU Law of Investment: Past, Present, and Future, Hart Publishing/Bloomsbury: Oxford.
Groussot, X, Öberg, M-L, Butler, G (eds) 2023, The EU Law of Investment: Past, Present, and Future, Hart Publishing/Bloomsbury: Oxford.
Butler, G 2023, Free Movement of Persons in the Nordic States through EU Law and EEA Law. in K. Hyltén-Cavallius & J. Paju (eds), Free Movement of Persons in the Nordic States: EU Law, EEA Law, and Regional Cooperation, Hart Publishing/Bloomsbury: Oxford. ISBN (Print): 9781509951840 (978-1-5099-5184-0). ISBN (Electronic): 9781509951857 (978-1-5099-5185-7), 9781509951864 (978-1-5099-5186-4), 9781509951871 (978-1-5099-5187-1). pp. 31-54. DOI: 10.5040/9781509951871.ch-003.
Butler, G 2023, Tribunals in the Nordic States and Referrals to the European Courts. in J. Reichel & M. Zamboni (eds), Scandinavian Studies in Law: Volume 69 – Rule of Law, Jure: Stockholm. ISBN (Print): 9789185142828. pp. 145-176.
Butler, G 2023, EU Internal Market Law, Elgar European Law series, Edward Elgar Publishing: Cheltenham.
Butler, G & Sørensen, K.E. 2022, The Prohibition of Abuse of EU Law: A Special General Principle. in K. S. Ziegler, P. J. Neuvonen, & V. Moreno-Lax (eds), Research Handbook on General Principles in EU Law: Constructing Legal Orders in Europe, Research Handbooks in European Law, Edward Elgar: Cheltenham. ISBN (Print): 9781784712372 (978-1-7847-1237-2). ISBN (Electronic): 9781784712389 (978-1-7847-1238-9). pp. 402-422. DOI: 10.4337/9781784712389.00033.
Butler, G 2022, The Creation of an Internal Market for Private Pensions: Legal Design, Mobility, Retirement, and Taxation, EU Law Live, Weekend Edition, vol. 101, pp. 2-10.
Butler, G 2022, State Aid: Extension of the Acquis and the ‘Effect on Trade’. in F. Fabbrini (ed), The Law and Politics of Brexit: Volume IV: Protocol on Ireland/Northern Ireland, Oxford University Press: Oxford. ISBN (Print, hardback): 9780192863935 (978-0-1928-6393-5), ISBN (Print, paperback): 9780192863942 (978-0-1928-6394-2). ISBN (Electronic): 9780191954528 (978-0-1919-5452-8), 9780192678782 (978-0-1926-7878-2), 9780192678799 (978-0-1926-7879-9). pp. 185-208.
Butler, G & Wessel, RA (eds) 2022, EU External Relations Law: The Cases in Context, Hart Publishing/Bloomsbury: Oxford. ISBN (Print): 9781509939695 (978-1-5099-3969-5). ISBN (Electroninc): 9781509939701 (978-1-5099-3970-1), 9781509939718 (978-1-5099-3971-8), 9781509939725 (978-1-5099-3972-5). 1048 pp. DOI: 10.5040/9781509939725.
Cited in:
Opinion of Advocate General Nicholas Emiliou in Case C‑516/22, European Commission v United Kingdom of Great Britain and Northern Ireland (Judgment of the UK Supreme Court) ECLI:EU:C:2023:857, Court of Justice of the European Union, 9 November 2023. (Fifth Chamber).
Butler, G 2022, The EU Customs Union, Free Movement of Goods, and Enforcement Mechanisms in the Protocol on Northern Ireland: A Legal Appraisal. in A. Lazowski & A. Cygan (eds). Research Handbook on Legal Aspects of Brexit, Research Handbooks in European Law, Edward Elgar: Cheltenham. ISBN (Print): 9781800373136 (978-1-80037-313-6). ISBN (Electronic): 978-1-80037-314-3. pp. 175-197. DOI: 10.4337/9781800373143.00016.
Butler, G 2022, Hidden Administrative Review in EU Law: The BoAs of EU Agencies in the Common Foreign and Security Policy. in M. Chamon, A. Volpato & M. Eliantonio (eds), Boards of Appeal of EU Agencies: Towards Judicialization of Administrative Review?, Oxford University Press: Oxford. ISBN (Print): 9780192849298 (978-0-1928-4929-8). ISBN (Electronic): 9780192665973 (978-0-1926-6597-3). pp. 122-150. DOI: 10.1093/oso/9780192849298.003.0007.
Butler, G 2022, Max Sørensen (1913-1981): From Diplomat to Professor to Judge of the Court of Justice of the European Communities. in S. Vogenauer & P. Bajon (eds), Key Biographies in the Legal History of the European Union (1950-1993).
Kassoti, E & Butler, G 2022, The Approach of the CJEU to International Law: Towards a Context-Specific Approach. in E. Fahey & I. Mancini (eds), Understanding the EU as a Good Global Actor: Ambitions, Values, and Metrics, Edward Elgar Publishing: Cheltenham. ISBN (Print): 9781802202977 (978-1-8022-0297-7). ISBN (Electronic): 9781802202984 (978-1-8022-0298-4). pp. 261-276. DOI: 10.4337/9781802202984.00025.
Neergaard, U & Butler, G 2022, Denmark’s Defence Opt-out, the Forthcoming Referendum, and the Changing Face of EU Defence and Security Arrangements, EU Law Live, Weekend Edition, vol. 95, pp. 2-11.
Butler, G 2022, The Acceptance, Incorporation, and Re-translation of European Union law. in B. Davies, & F. Nicola (eds), EU Law Stories II: Re-translating European Legal Concepts into Domestic Legal Contexts, Cambridge University Press: Cambridge.
Butler, G 2022, ‘EU Secondary Law Unable to Impose Unanimity within the Council for Modifying/Amending EU International Agreements: Commission v Council (South Korea)’ EU Law Live, 16 March 2022.
Butler, G 2021, ‘The Modification/Amendment of EU International Agreements – Unanimous or Qualified Majority Decision-making? The Opinion of AG Richard de la Tour in Commission v Council (South Korea)’ EU Law Live, 2 November 2021.
Butler, G 2021, ‘The EU’s Contractual Relations and the Arbitration Clause: Disputes at the Court of Justice of the European Union’ European Law Review, vol. 46. no. 3. pp. 345-363.
Butler, G 2021, The Balance of Powers and the EU’s Common Foreign and Security Policy, in D. Fromage, & A. Herranz-Surrallés (eds), Executive-Legislative (Im)balance in the European Union, Parliamentary Democracy in Europe, Hart Publishing: Oxford. ISBN (Print): 9781509930005 (978-1-50993-000-5). ISBN (Electronic): 9781509930036 (978-1-50993-003-6), 9781509930029 (978-1-50993-002-9), 9781509930012 (978-1-50993-001-2). pp. 263-284. DOI: 10.5040/9781509930036.ch-015.
Butler, G 2021, The European Rule of Law Standard, the Nordic States, and EU Law. in A. Bakardjieva Engelbrekt, A. Moberg, & J. Nergelius (eds), Rule of Law in the EU: 30 Years After the Fall of the Berlin Wall, Hart Publishing/Bloomsbury: Oxford. ISBN (Print): 9781509941599 (978-1-5099-4159-9). ISBN (Electronic): 9781509941605, (978-1-5099-4160-5), 9781509941612 (978-1-5099-4161-2). pp. 243-264. DOI: 10.5040/9781509941629.ch-011.
Butler, G 2021 ‘Private Pensions and EU Internal Market Law: Enhancing Retirement Provision through Harmonisation’ European Business Law Review, vol. 32, no. 2. pp. 853-876.
Butler, G 2020 ‘The Future of EU International Agreements as Legal Instruments in the ASEAN Region’ Journal of International and Comparative Law, vol. 7, no. 2, pp. 287-305.
Butler, G. & Snaith, H 2020, Negative Solidarity: The European Union and the Financial Crisis. in H. Krunke, H. Petersen, & I. Manner (eds), Transnational Solidarity: Concept, Challenges and Opportunities, Cambridge University Press: Cambridge. ISBN (Print): 9781108487368 (978-1-1084-8736-8). ISBN (Electronic): 9781108766593 (9781-1-087-6659-3). pp. 128-164. DOI: 10.1017/9781108766593.009.
Banke, C. F. S., Nissen, C., Schmidt, J. L., Olesen, M. R., Mouritzen, H., Rahbek-Clemmensen, J., Pedersen, R. B., Butler, G., Andersen, L. R. 2020 European Defence Cooperation and the Danish Defence Opt-out: Report on the developments in the EU and Europe in the field of security and defence policy and their implications for Denmark (Europæisk forsvarssamarbejde og det danske forsvarsforbehold: Udredning om udviklingen i EU og Europa på det sikkerheds- og forsvarspolitiske område og betydningen for Danmark). København Copenhagen (København): Danish Institute for International Studies (Dansk Institut for Internationale Studier). ISBN: 978877605999 (978-87-7605-999). 108 pp.
Banke, C. F. S., Nissen, C., Schmidt, J. L., Olesen, M. R., Mouritzen, H., Rahbek-Clemmensen, J., Pedersen, R. B., Butler, G., Andersen, L. R. 2019 Europæisk forsvarssamarbejde og det danske forsvarsforbehold: Udredning om udviklingen i EU og Europa på det sikkerheds- og forsvarspolitiske område og betydningen for Danmark (European Defence Cooperation and the Danish Defence Reservation: Investigation on developments in the EU and Europe in the field of security and defence policy and the importance for Denmark). København (Copenhagen): Dansk Institut for Internationale Studier (Danish Institute for International Studies). ISBN (Print): 9788776059859 (978-8-7760-5985-9). ISBN (Electronic): 9788776059866 (978-8-7760-5986-6). 108 pp.
Opinion of Advocate General Evgeni Tanchev, Case C-730/18 P, SC v Eulex Kosovo, ECLI:EU:C:2020:176, Court of Justice of the European Union, 5 March 2020 (First Chamber case).
Opinion of Advocate General Gerard Hogan, Case C‑134/19 P, Bank Refah Kargaran v Council of the European Union, ECLI:EU:C:2020:396, Court of Justice of the European Union, 28 May 2020 (Grand Chamber case).
Opinion of Advocate General Evgeni Tanchev, Case C‑283/20, CO, ME, GC and 42 Others v MJ (Head of Mission), European Commission, European External Action Service (EEAS), Council of the European Union, Eulex Kosovo, ECLI:EU:C:2021:781, Court of Justice of the European Union, 30 September 2021 (Fifth Chamber case).
Opinion of Advocate General Tamara Ćapeta in Joined Cases C‑29/22 P and C‑44/22 P, KS, KD v Council of the European Union, European Commission, and European External Action Service (EEAS), and European Commission v KS, KD, Council of the European Union, and European External Action Service (EEAS), ECLI:EU:C:2023:901, Court of Justice of the European Union, 23 November 2023 (Grand Chamber case).
Opinion of Advocate General Michal Bobek, Case C-418/18 P, Puppinck and Others v European Commission, ECLI:EU:C:2019:640, Court of Justice of the European Union (Grand Chamber case).
Butler, G 2018, 'Implementing a Complete System of Legal Remedies in EU Foreign Affairs Law' Columbia Journal of European Law, vol. 24, no. 3, pp. 637-676.
Opinion of Advocate General Priit Pikamäe, Case C-121/21, Czech Republic v Poland, ECLI:EU:C:2022:74, Court of Justice of the European Union (Grand Chamber case) (Túrow Mine).
Butler, G. & Jensen, M.D., 2017, Storbritanniens had-kærlighedsforhold til Den Europæiske Union (The United Kingdom's Love-Hate Relationship with the European Union). in C.H. Grøn (ed), Politologisk Årbog 2016-2017 (Political Science Yearbook 2016-2017). Hans Reitzels Forlag, Copenhagen. ISBN-10: 8741269801. ISBN-13: 9788741269801 (978-87-412-6980-1). pp. 20-23.
Butler, G 2016, Constitutional Limits of the EU's Common Foreign and Security Policy. Ph.D. thesis. 333 pp.
Opinion of Advocate General Eleanor Sharpston, Case C-670//16, Tsegezab Mengesteab v Federal Republic of Germany, ECLI:EU:C:2017:480, Court of Justice of the European Union (Grand Chamber case).
Butler, G, Jensen, MD & Snaith, H (eds) 2016, 'British Exit from the EU: Legal and Political Implications' Journal of European Public Policy, vol 23, no. 9, pp. 1278-1328.
Butler, G 2016, 'A new means of dissemination for doctoral research in Danish legal education' Retfaerd (Nordic Journal of Law and Justice), vol 39, no. 1/152, pp. 88-95.
Butler, G 2016, 'The Ultimate Stumbling Block? The Common Foreign and Security Policy, and Accession of the European Union to the European Convention on Human Rights' Dublin University Law Journal, vol 39, no. 1, pp. 229-244.
Butler, G 2015, 'Pinpointing the Appropriate Legal Basis for External Action' European Journal of Risk Regulation, vol 6, no. 2, pp. 323-328.