@article{Wilkin_(ed._by)_Jerzy_Supplement,
 author={Wilkin (ed. by), Jerzy},
 address={<p>
 Warsaw
 </p>},
 howpublished={online},
 pages={93 s.},
 journal={Poland in the European Union: Achievements, Problems & Prospects},
 publisher={Biuro Upowszechniania i Promocji Nauki PAN},
 title={Supplement},
}