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Management > 2015 > Vol. 19, no. 1 > 89--97
Combustion Engines > 2013 > R. 52, nr 3 > 192--201
Management > 2013 > Vol. 17, no. 1 > 383--393
Management > 2015 > Vol. 19, no. 1 > 89--97
Combustion Engines > 2013 > R. 52, nr 3 > 192--201
Management > 2013 > Vol. 17, no. 1 > 383--393