| Which rules shape EU external governance? Patterns of rule selection in foreign and security policies E Barbé, O Costa, AH Surrallés, M Natorski Journal of European Public Policy 16 (6), 834-852, 2009 | 109* | 2009 |
| Drawing the neighbours closer… to what? Explaining emerging patterns of policy convergence between the EU and its neighbours E Barbé, O Costa, A Herranz, E Johansson-Nogués, M Natorski, ... Cooperation and conflict 44 (4), 378-399, 2009 | 102 | 2009 |
| The influence of international institutions on the EU: when multilateralism hits Brussels O Costa, KE Jørgensen Palgrave Macmillan, 2012 | 94* | 2012 |
| The politicization of EU external relations O Costa Journal of European public policy 26 (5), 790-802, 2019 | 89 | 2019 |
| Une Liaison Transnationale O Costa, P Müller Comparative European Politics, 1-18, 2018 | 84* | 2018 |
| Is climate change changing the EU? The second image reversed in climate politics O Costa Cambridge Review of International Affairs 21 (4), 527-544, 2008 | 55* | 2008 |
| Introducción: El multilateralismo en crisis/Introduction: multilateralism in crisis OC Fernández Revista CIDOB d'afers internacionals, 7-25, 2013 | 41 | 2013 |
| Introduction: shades of contestation and politicisation of CFSP K Biedenkopf, O Costa, M Góra European security 30 (3), 325-343, 2021 | 38 | 2021 |
| Greening the Neighbourhood: The Environmental Dimension of the ENP in Morocco and Ukraine A Buzogany, O Costa Eur. Foreign Aff. Rev. 14, 525, 2009 | 31 | 2009 |
| EU policy responses to a shifting multilateral system E Barbé, O Costa, R Kissack Palgrave Macmillan, 2016 | 30 | 2016 |
| Politicization of EU Trade Policy Across Time and Space D De Bièvre, P Garcia-Duran Huet, LJ Eliasson, O Costa Politics and Governance, 2020, vol. 8, num. 1, p. 239-242, 2020 | 27 | 2020 |
| A moving target. EU actorness and the Russian invasion of Ukraine O Costa, E Barbé Journal of European Integration 45 (3), 431-446, 2023 | 26 | 2023 |
| The influence of international institutions on the EU: a framework for analysis O Costa, KE Jørgensen The Influence of International Institutions on the EU: When Multilateralism …, 2012 | 26 | 2012 |
| Managed globalization 2.0: The European commission’s response to trade politicization P Garcia-Duran, LJ Eliasson, O Costa Politics and Governance 8 (1), 290-300, 2020 | 22 | 2020 |
| Spain as an actor in european and international climate policy: From a passive to an active laggard? O Costa South European Society & Politics 11 (2), 223-240, 2006 | 20 | 2006 |
| Convergence on the Fringe: The Environmental Dimension of Euro-Mediterranean Cooperation O Costa Mediterranean Politics 15 (2), 149-168, 2010 | 17 | 2010 |
| El Estudio de los regímenes internacionales: el caso del cambio climático O Costa Universitat Autònoma de Barcelona,, 2005 | 17 | 2005 |
| 9 Who decides EU foreign policy on climate change? O Costa Climate Change and Foreign Policy: Case Studies from East to West 71, 134, 2009 | 16* | 2009 |
| The unexpected EU leadership on landmines: the influence of the Ottawa Convention on the EU O Costa European Security 18 (3), 245-261, 2009 | 15 | 2009 |
| Assessing Influence Between International Organizations O Costa Palgrave Handbook of Inter-Organizational Relations in World Politics, 389-405, 2017 | 14 | 2017 |
