https://kyivindependent.com/carl-bildt-the-return-of-eu-enlargement/
https://onlinelibrary.wiley.com/doi/10.1111/jcms.13415
http://questionegiustizia.it/articolo/emergenza-sanitaria-dubbi-di-costituzionalita-di-un-giudice-e-di-un-avvocato_14-04-2020.php?fbclid=IwAR0OuwnVMxu86bDPLxkHPKyT4Ssi6VcfNuQPCB1RTC08A_phmYOcovRnYgo
https://visegradinsight.eu/perfect-storm-covid19-eurosceptic-poland-hungary/