@misc{Piotr_Kalka_The_2013,
 author={Piotr Kalka},
 address={Poznań},
 year={2013},
 contents={Strona 145-168},
 publisher={Poznań : IZ,},
 language={pol},
 title={The European Union in the Face of the Sovereign-Debt Crisis},
 type={text},
}