
https://www.aljazeera.com/features/2025/5/9/vladimir-putin-after-25-years-in-power-what-next-for-russias-president

https://voxeu.org/system/files/epublication/Economics%20of%20Brexit.pdf

https://cdn.ceps.eu/wp-content/uploads/2023/09/2023_17_Potential-Impact-of-Ukrainian-Accession-on-the-EUs-Budget.pdf