Molendowski, Edward, and Wojciech Polan. “Changes in Intra-Industry Competitiveness of the New Member States (EU-10) Economies During the Crisis, the Years 2009-2011”. Comparative Economic Research. Central and Eastern Europe, vol. 16, no. 3, Nov. 2013, pp. 63-83, doi:10.2478/cer-2013-0019.