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Polish Journal of Management Studies > 2019 > Vol. 20, No. 2 > 124--133
Polish Journal of Management Studies > 2015 > Vol. 12, No. 1 > 59--76
Inżynieria Mineralna > 2014 > R. 15, nr 2 > 41--44
Polish Journal of Management Studies > 2019 > Vol. 20, No. 2 > 124--133
Polish Journal of Management Studies > 2015 > Vol. 12, No. 1 > 59--76
Inżynieria Mineralna > 2014 > R. 15, nr 2 > 41--44