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Perspectives of Innovations, Economics and Business > 2013 > 13 > 2 > 19-31
Pieniądze i Więź > 2011 > 14 > 1(50) > 72-81
Business Research > 2010 > 3 > 1 > 37-47
Perspectives of Innovations, Economics and Business > 2013 > 13 > 2 > 19-31
Pieniądze i Więź > 2011 > 14 > 1(50) > 72-81
Business Research > 2010 > 3 > 1 > 37-47