@article{sitek_2018, 
  title={Applying the EU solidarity clause in practice}, 
  volume={36}, 
  DOI={10.13166/jms/86365}, 
  publisher={Wyzsza Szkola Gospodarki Euroregionalnej im. Alcide de Gasperi w Jozefowie}, 
  author={Sitek}, 
  year={2018}, 
  month={Apr}
  }