
http://ecdpm.org/wp-content/uploads/ETTG-Brief-Keijzer-Medinilla-November-2017.pdf

https://www.whitehouse.gov/wp-content/uploads/2018/10/The-Opportunity-Costs-of-Socialism.pdf

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