PIĄTAK, Łukasz. Konwergencja pomiędzy regionami Polski, 2005–2011. Comparative Economic Research. Central and Eastern Europe, [S. l.], v. 18, n. 2, p. 99–118, 2015. DOI: 10.1515/cer-2015-0014. Disponível em: https://czasopisma.uni.lodz.pl/CER/article/view/7067. Acesso em: 4 maj. 2024.