Moskal, A., Sobarnia, A., Pazera, S., & Kopania, Z. (Red.). (2021). Introduction .......... 19. 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? (s. 19-25). Wydawnictwo Księgarnia Akademicka. https://doi.org/10.12797/9788381385763.01