1. Beaune, Clément (2020): L’Europe, par-delà le COVID-19, Politique étrangère, 85 (3), 9–29
2. Cordesman, Anthony H. (2019): NATO’s „Brain Death“ Burdensharing Blunders: Focusing on the Right Investment, Force Strength, and Readiness Needs. Washington, D.C.: CSIS Working Paper
3. Deubner, Christian (1995): Deutsche Europapolitik: Von Maastricht nach Kerneuropa? Baden-Baden: Nomos
4. Deubner, Christian (2006): Closer Cooperation in Tomorrow’s European Union. Los Angeles: University of California, UCLA Occasional Lecture Series, https://escholarship.org/search?q=christian%20deubner
5. Deubner, Christian (2018): Security and Defence Cooperation in the EU. A Matter of Utility and Choice. Baden-Baden: Nomos