Moskal A, Sobarnia A, Pazera S, Kopania Z, red. I. The Historical Development of European Integration . 27. W: The European Union in Light of the COVID-19 Pandemic ‒ A Failure of European Integration or a Chance for Closer Cooperation Among Member States?. Wydawnictwo Księgarnia Akademicka; 2021:27-48. doi:10.12797/9788381385763.02