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Polish Journal of Management Studies > 2018 > Vol. 18, No. 1 > 44--57
Polish Journal of Management Studies > 2016 > Vol. 13, No. 1 > 69--80
Polish Journal of Management Studies > 2015 > Vol. 12, No. 1 > 177--185
Nowoczesne Systemy Zarządzania > 2011 > T. 6, nr 1 > 31--48