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Andrej Eliáš
Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Advanced Technologies Research Institute, Bottova 25, 917 24 Trnava, Slovakia
Pavol Závacký
Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Division of Communication and Information Systems, Paulínska 16, 917 24 Trnava, Slovakia