@misc{Kleer_Jerzy_Chapter_2019, author={Kleer, Jerzy and Kleiber, Michał}, pages={66-80}, pages={110 ss.}, journal={Where is Europe headed?}, howpublished={online}, year={2019}, publisher={Warszawa: Komitet Prognoz „Polska 2000 Plus” przy Prezydium PAN,}, language={angielski}, title={Chapter 5: Challenges faced by Europe}, URL={http://publikacje.pan.pl/Content/116713/PDF/7%20Chapter%20V.pdf}, }