https://cdn.ceps.eu/wp-content/uploads/2023/09/2023_17_Potential-Impact-of-Ukrainian-Accession-on-the-EUs-Budget.pdf
https://www.etui.org/sites/default/files/2023-01/Social%20policy%20in%20the%20European%20Union-state%20of%20play%202022-Policy%20making%20in%20a%20permacrisis-2023.pdf
https://www.project-syndicate.org/commentary/trump-spurs-european-defense-integration-by-joseph-s–nye-2017-07