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Marek Repka
Institute of Computer Science and Mathematics Faculty of Electrical Engineering and Information Technology Slovak University of Technology in Bratislava Ilkovicova 3 SK–812-19 Bratislava SLOVAKIA
Pavol Zajac
Institute of Computer Science and Mathematics Faculty of Electrical Engineering and Information Technology Slovak University of Technology in Bratislava Ilkovicova 3 SK-812-19 Bratislava SLOVAKIA