@Article{443367,
     author = "Izabela Jonek-Kowalska",
     title = "State Aid and Competitiveness of the Hard Coal Mining Industry in the European Union ",
     year =  2015,
     volume =  10,
     number =  1,
     journal =  Equilibrium. Quarterly Journal of Economics and Economic Policy,
     pages =  s. 69-87,
    }