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Physical Culture and Sport. Studies and Research > 2013 > 58 > 1 > 33-42
Physical Culture and Sport. Studies and Research > 2009 > 46 > 1 > 167-176
Comparative Economic Research. Central and Eastern Europe > Comparative Economic Research. Central and Eastern Europe Volume 17 (2014), number 2
Acta Universitatis Lodziensis. Folia Oeconomica > Acta Universitatis Lodziensis. Folia Oeconomica nr 327(1)/2017