1. Bankier.pl. 2018. “Rekordowa populacja Polaków w Wielkiej Brytanii”. Bankier.pl., May 25. Accessed April 17, 2021. https://www.bankier.pl/wiadomosc/Rekordowa-populacja-Polakow-w-Wielkiej-Brytanii-4120183.html.
2. Barigazzi, Jacopo, and Charlie Cooper. 2018. “Brussels Issues Démarche on Alleged British Divide-and-Rule Tactic.” Politico, September 4. Accessed June 1, 2022. https://www.politico.eu/article/brexit-michel-barnier-dominic-raab-brussels-warns-diplomats-against-uks-brexit-divide-and-rule-scheme.
3. Belfast Telegraph. 2019. “Merkel Shows Solidarity with Communities on Both Sides of Irish Border.” Belfast Telegraph, April 4. Accessed April 3, 2021. https://www.belfasttelegraph.co.uk/news/northern-ireland/merkel-shows-solidarity-with-communities-on-both-sides-of-irish-border-37984398.html.
4. Bielecki, Jędrzej. 2015. “Polityka zagraniczna: Duda wraca do koncepcji międzymorza.” Rzeczpospolita, August 18. Accessed June 13, 2022. https://www.rp.pl/kraj/art11513271-polityka-zagraniczna-duda-wraca-do-koncepcji-miedzymorza.