
https://www.gov.pl/web/primeminister/letter-from-prime-minister-mateusz-morawiecki-to-the-heads-of-governments-and-the-presidents-of-the-european-council-the-european-commission-and-the-european-parliament-on-relations-between-national-law-and-european-law

https://www.19fortyfive.com/2022/05/russias-invasion-of-ukraine-is-transforming-europe/?utm_source=newsletter&utm_medium=email&utm_campaign=09%2F05%2F22

https://researchbriefings.files.parliament.uk/documents/CBP-7212/CBP-7212.pdf