„Europa wird nur sein, wenn es einig ist.“ Deutsche Christliche Demokraten in der Hohen Behörde der EGKS und der Kommission der Euratom, 1952-1967

Globale Handelsmacht oder regionaler Block? Die EU zwischen Freihandel und Protektionismus
Seidel, K. 2024. Globale Handelsmacht oder regionaler Block? Die EU zwischen Freihandel und Protektionismus. in: Haeussler, M. and Roos, M. (ed.) Europäische Geschichte zwischen Anspruch und Wirklichkeit. Eine historische Bestandsaufnahme Berlin Metropol Verlag. pp. 83-97

Setting the agenda on Britain’s policy towards the European Community: Miriam Camps at Chatham House
Seidel, K. 2024. Setting the agenda on Britain’s policy towards the European Community: Miriam Camps at Chatham House. Contemporary European History. 33 (4), pp. 1465-1481. https://doi.org/10.1017/S0960777323000619

Book review: Aurelie Dianara Andry. Social Europe, the Road not Taken. The Left and European Integration in the Long 1970s. [Oxford Studies in Modern European History Series.] Oxford University Press, Oxford [etc.] 2022. xii, 320 pp. £81.00. (Open Access.)
Seidel, K. 2023. Book review: Aurelie Dianara Andry. Social Europe, the Road not Taken. The Left and European Integration in the Long 1970s. [Oxford Studies in Modern European History Series.] Oxford University Press, Oxford [etc.] 2022. xii, 320 pp. £81.00. (Open Access.). International Review of Social History. 68 (3), pp. 545-548. https://doi.org/10.1017/S0020859023000561

Introduction
Leucht, B., Seidel, K. and Warlouzet, L. 2023. Introduction. in: Leucht, B., Seidel, K. and Warlouzet, L. (ed.) Reinventing Europe: The History of the European Union, 1945 to the Present Bloomsbury Academic. pp. 1-4

Interpretations of European integration history and introduction to research tools
Leucht, B., Seidel, K. and Warlouzet, L. 2023. Interpretations of European integration history and introduction to research tools. in: Leucht, B., Seidel, K. and Warlouzet, L. (ed.) Reinventing Europe: The History of the European Union, 1945 to the Present Bloomsbury Academic. pp. 353-372

The Franco-German relationship at the heart of EU history
Seidel, K. and Germond, C. 2023. The Franco-German relationship at the heart of EU history. in: Seidel, K., Leucht, B. and Warlouzet, L. (ed.) Reinventing Europe: The History of the European Union, 1945 to the Present London Bloomsbury Academic. pp. 299-316

Ideas and movements in favour of European integration from the nineteenth century until today
Seidel, K. 2023. Ideas and movements in favour of European integration from the nineteenth century until today. in: Leucht, B., Seidel, K. and Warlouzet, L. (ed.) Reinventing Europe: The History of the European Union, 1945 to the Present London Bloomsbury Academic. pp. 243-260

Milk lakes and butter mountains: The common agricultural policy
Seidel, K. 2023. Milk lakes and butter mountains: The common agricultural policy. in: Leucht, B., Seidel, K. and Warlouzet, L. (ed.) Reinventing Europe: The History of the European Union, 1945 to the Present London Bloomsbury Academic. pp. 167-182

The European Commission: A government in the making?
Seidel, K. 2023. The European Commission: A government in the making? in: Leucht, B., Seidel, K. and Warlouzet, L. (ed.) Reinventing Europe: The History of the European Union, 1945 to the Present London Bloomsbury Academic. pp. 89-106

From the early Common Market to the crises of the 1960s, 1958-68
Seidel, K. 2023. From the early Common Market to the crises of the 1960s, 1958-68. in: Leucht, B., Seidel, K. and Warlouzet, L. (ed.) Reinventing Europe: The History of the European Union, 1945 to the Present London Bloomsbury Academic. pp. 27-45

Miriam Camps and European Integration: Blurring the Boundaries between Scholarship and Diplomacy
Seidel, K. 2023. Miriam Camps and European Integration: Blurring the Boundaries between Scholarship and Diplomacy. Global Studies Quarterly. 3 (1) ksad005. https://doi.org/10.1093/isagsq/ksad005

Helmut Schmidt and Anglo-German relations: a European misunderstanding by Mathias Haeussler
Seidel, K. 2022. Helmut Schmidt and Anglo-German relations: a European misunderstanding by Mathias Haeussler. National Identities . 24 (1), pp. 69-71. https://doi.org/10.1080/14608944.2020.1863549

Book Review: Project Europe: A History by Kiran Klaus Patel
Seidel, Katja 2022. Book Review: Project Europe: A History by Kiran Klaus Patel. Journal of Contemporary History. 58 (1), pp. 208-210. https://doi.org/10.1177/00220094221130400e

Learning Across Institutions – Secretariats (and Secretaries) from the League of Nations to the ECSC High Authority and the EEC Commission
Seidel, K. 2020. Learning Across Institutions – Secretariats (and Secretaries) from the League of Nations to the ECSC High Authority and the EEC Commission. in: Gram-Skjoldager, K., Ikonomou, H.A. and Kahlert, T. (ed.) Organizing the 20th-Century World: International Organizations and the Emergence of International Public Administration, 1920-1960 London Bloomsbury.

Britain, the common agricultural policy and the challenges of membership in the European Community: a political balancing act
Seidel, K. 2020. Britain, the common agricultural policy and the challenges of membership in the European Community: a political balancing act. Contemporary British History. 34 (2), pp. 179-203. https://doi.org/10.1080/13619462.2019.1650739

The Challenges of Enlargement and GATT Trade Negotiations: Explaining the Resilience of the European Community’s Common Agricultural Policy in the 1970s
Seidel, K. 2020. The Challenges of Enlargement and GATT Trade Negotiations: Explaining the Resilience of the European Community’s Common Agricultural Policy in the 1970s. The International History Review. 40 (2), pp. 352-370. https://doi.org/10.1080/07075332.2019.1567570

External Dimensions of the Common Agricultural Policy: From Developed to Developing Countries
Seidel, K. 2020. External Dimensions of the Common Agricultural Policy: From Developed to Developing Countries. in: Krotz, Ulrich, Patel, Kiran Klaus and Romero, Federico (ed.) Europe's Cold War Relations: The EC Towards a Global Role Cambridge Bloomsbury Academic.

The Common Fisheries Policy: The struggle for a sustainable policy
Seidel, K. 2019. The Common Fisheries Policy: The struggle for a sustainable policy. in: Dujardin, V. and Bussiere, E. (ed.) The European Commission 1986-2000: History and memories of an institution Luxembourg Office for Official Publications of the European Communities. pp. 361-370

The Common Agricultural Policy: 'In order to preserve the CAP, we need to change it'
Seidel, K. 2019. The Common Agricultural Policy: 'In order to preserve the CAP, we need to change it'. in: Dujardin, V. and Bussiere, E. (ed.) The European Commission 1986-2000: History and memories of an institution Luxembourg Office for Official Publications of the European Communities. pp. 343-360

Robert Marjolin: securing the common market through economic and monetary union
Seidel, K. 2016. Robert Marjolin: securing the common market through economic and monetary union. in: Dyson, K. and Maes, I. (ed.) Architects of the Euro: intellectuals as policy makers Oxford, UK Oxford University Press. pp. 51-73

L'affirmation d'une fonction publique europeenne
Seidel, K. and Mangenot, M. 2014. L'affirmation d'une fonction publique europeenne. in: Bussiere, E., Dujardin, V., Dumoulin, M., Ludlow, P., Brouwer, J.W. and Tilly, P. (ed.) La Commission Europeenne 1973-86: histoire et mémoires d’une institution Luxembourg Office for Official Publications of the European Communities. pp. 61-71

Consolidating the European civil service
Seidel, K. and Mangenot, M. 2014. Consolidating the European civil service. in: Bussiere, E., Dujardin, V., Dumoulin, M., Ludlow, P., Brouwer, J.W. and Tilly, P. (ed.) The European Commission 1973–86: history and memories of an institution Luxembourg Office for Official Publications of the European Communities. pp. 61-70

La politique agricole commune et la politique commune de la peche: des domaines contestes
Seidel, K. 2014. La politique agricole commune et la politique commune de la peche: des domaines contestes. in: Bussiere, E., Dujardin, V., Dumoulin, M., Ludlow, P., Brouwer, J.W. and Tilly, P. (ed.) La Commission Europeenne 1973-86: histoire et mémoires d’une institution Luxembourg Office for Official Publications of the European Communities. pp. 319-342

Contested fields: the Common Agricultural Policy and the Common Fisheries Policy
Seidel, K. 2014. Contested fields: the Common Agricultural Policy and the Common Fisheries Policy. in: Bussiere, E., Dujardin, V., Dumoulin, M., Ludlow, P., Brouwer, J.W. and Tilly, P. (ed.) The European Commission 1973-86: history and memories of an institution Luxembourg Office for Official Publications of the European Communities. pp. 313-336

The drafting and the role of regulation 17: a hard-fought compromise
Pace, L.F. and Seidel, K. 2013. The drafting and the role of regulation 17: a hard-fought compromise. in: Patel, K.K. and Schweitzer, H. (ed.) The historical foundations of EU competition law Oxford Oxford University Press. pp. 54-88

Editorial: The common agricultural policy: historical and interdisciplinary perspectives
Seidel, K., Germond, C. and Spoerer, M. 2010. Editorial: The common agricultural policy: historical and interdisciplinary perspectives. Journal of European Integration History. 16 (2), pp. 163-166.

The process of politics in Europe: the rise of European elites and supranational institutions
Seidel, K. 2010. The process of politics in Europe: the rise of European elites and supranational institutions. London I.B. Tauris.

Taking Farmers off Welfare. The EEC Commission’s Memorandum “Agriculture 1980” of 1968
Seidel, K. 2010. Taking Farmers off Welfare. The EEC Commission’s Memorandum “Agriculture 1980” of 1968. Journal of European Integration History. 16 (2), pp. 237-255. https://doi.org/10.5771/0947-9511-2010-2-83

From pioneer work to refinement: publication trends
Seidel, K. 2010. From pioneer work to refinement: publication trends. in: Kaiser, W. and Varsori, A. (ed.) European union history: themes and debates Basingstoke Palgrave Macmillan. pp. 26-44

Supranational ideals and pragmatic choices: the high authority of the European coal and steel community, 1952-1955
Seidel, K. 2009. Supranational ideals and pragmatic choices: the high authority of the European coal and steel community, 1952-1955. in: Francia Thorbecke Jan Verlag.

“So ein mix von menschen“: gruppenbiographische studien zu beamten in der EWG kommission
Seidel, K. 2009. “So ein mix von menschen“: gruppenbiographische studien zu beamten in der EWG kommission. in: Gehler, M. (ed.) From common market to European union building: 50th anniversary of the Rome treaties 1957-2007 Cologne, Weimar, Vienna Böhlau. pp. 393-417

Making Europe through the CAP: DG VI and its high officials
Seidel, K. 2009. Making Europe through the CAP: DG VI and its high officials. in: Patel, K.K. (ed.) Fertile ground for Europe? The history of European integration and the common agricultural policy since 1945 Baden-Baden Nomos. pp. 161-179

DG IV and the origins of a supranational competition policy: establishing an economic constitution for Europe
Seidel, K. 2009. DG IV and the origins of a supranational competition policy: establishing an economic constitution for Europe. in: Kaiser, W., Leucht, B. and Rasmussen, M. (ed.) The history of the European union: origins of a trans- and supranational policy 1950-1972 London Routledge. pp. 129-147

Actors and ideas: tracing continuities in European agricultural policy
Seidel, K. 2009. Actors and ideas: tracing continuities in European agricultural policy. in: Knudsen, A.C. and Rasmussen, M. (ed.) The road to a united Europe: interpretations of the process of European integration Brussels et al. P.I.E. Peter Lang. pp. 289-304

Du Traité de Paris au règlement 17/1962: ruptures et continuités dans la politique européenne de concurrence, 1950-1962
Seidel, K. and Leucht, B. 2008. Du Traité de Paris au règlement 17/1962: ruptures et continuités dans la politique européenne de concurrence, 1950-1962. Histoire, Economie et Société. 1, pp. 35-46.

A European administration in the making: recruitment patterns, national balance and their impact on the European high officials
Seidel, K. 2007. A European administration in the making: recruitment patterns, national balance and their impact on the European high officials. in: Bitsch, M.T., Loth, W. and Barthel, C. (ed.) Cultures politiques, opinions publiques et intégration européenne Brussels Bruylant. pp. 389-404

Denys Hay
Seidel, K. 2007. Denys Hay. in: Duchhardt, H., Morawiec, M., Schmale, W. and Schulz, W. (ed.) Europa-historiker: ein biographisches handbuch Göttingen Vandenhoek & Ruprecht.

Gestalten statt verwalten: der beitrag von europabeamten zur europäischen integration
Seidel, K. 2005. Gestalten statt verwalten: der beitrag von europabeamten zur europäischen integration. Historische Mitteilungen. 18, pp. 136-149.