@misc{_Europa_2021,
 volume={40},
 copyright={Creative Commons Attribution BY 4.0 license},
 address={Warszawa},
 journal={Europa XXI},
 howpublished={online},
 year={2021},
 publisher={IGiPZ PAN},
 language={eng},
 title={Europa XXI 40 (2021) : New challenges for European cross-border and transboundary cooperation},
 type={Text},
}