@misc{Jonek-Kowalska_Izabela_State,
 author={Jonek-Kowalska, Izabela},
 howpublished={online},
 language={eng},
 title={State aid and competitiveness of the hard coal mining industry in the European Union},
 keywords={state aid, competitiveness of industries, hard coal mining industry in Poland, hard coal mining industry in EU, Polish mining enterprises},
}