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Annales Universitatis Mariae Curie-Skłodowska, Sectio H Oeconomia > 2016 > 50 > 4 > 467-476
Progress in Economic Sciences > 2015 > 2 > 33-46
Annales Universitatis Mariae Curie-Skłodowska, Sectio H Oeconomia > 2016 > 50 > 4 > 467-476
Progress in Economic Sciences > 2015 > 2 > 33-46