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Strategic Change > 29 > 3 > 363 - 374
Journal of Applied Computer Science Methods > 2015 > Vol. 7 No. 2 > 105--115
Optimum. Studia Ekonomiczne > 2010 > 3 (47) > 316-334
Strategic Change > 29 > 3 > 363 - 374
Journal of Applied Computer Science Methods > 2015 > Vol. 7 No. 2 > 105--115
Optimum. Studia Ekonomiczne > 2010 > 3 (47) > 316-334