@Article{428702,
     author = "Bartosz Godziszewski, Michał Kruszka, Marcin Puziak",
     title = "Income Distribution and Regional Convergence in Poland and the European Union",
     year =  2013,
     volume =  8,
     number =  1,
     journal =  Olsztyn Economic Journal,
     pages =  s. 45-60,
    }