https://www.ips-journal.eu/topics/foreign-and-security-policy/the-world-of-tomorrow-7101/
http://www.kas.de/wf/doc/kas_450-2190-2-30.pdf?170424105349
https://czasopisma.uksw.edu.pl/index.php/p/article/download/7285/6507&ved=2ahUKEwjV0c-qnYOAAxWp_7sIHaj9CE8QFnoECAgQAg&usg=AOvVaw0uuJrVk9AhPIMT2xjWvSTQ
https://www.socialeurope.eu/2017/07/poland-after-trump/