Moskal, Anna, Aleksandra Sobarnia, Szymon Pazera, i Zuzanna Kopania, red. The European Union in Light of the COVID-19 Pandemic ‒ A Failure of European Integration or a Chance for Closer Cooperation Among Member States?. Poland: Wydawnictwo Księgarnia Akademicka, 2021. Dostęp marzec 3, 2026. https://books.akademicka.pl/publishing/catalog/book/273.