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Ľuboš Polakovič
Center, Spiral LOTES Management Institute,
Peter Szabó
Slovak University of Technology in Bratislava,
Faculty of Materials Science and Technology in Trnava, Institute of Industrial Engineering and ManagementTrnava
György Czifra
Óbuda University,
Bánki Donát Faculty of Mechanical and Safety EngineeringBudapest, Hungary