Adamczyk, Natalia. «An assessment of defence policy of EU member states in 2014-2018; the cases of France, Great Britain, and Poland . 153». в Bezpieczeństwo regionalne: Węzłowe problemy i procesy, под редакцией Piotr Bajor, Societas, Vol. 132:153–182. Societas. Poland: Księgarnia Akademicka Publishing, 2020. просмотрено ноябрь 5, 2026. https://books.akademicka.pl/publishing/catalog/book/215/chapter/3745.