@misc{Raczkowski_Konrad_Measuring,
 author={Raczkowski, Konrad},
 howpublished={online},
 publisher={Publishing House of the University of Economics in Katowice},
 language={eng},
 title={Measuring the tax gap in the European economy},
 type={artykuł},
 keywords={European economy, methodology, tax gap, tax revenues},
}