Jaroslav MICHALCO, Pavol NAVRAT Slovak University of Technology in Bratislava, Faculty of Informatics and Information Technologies Ilkovicova 3, 842 16, Bratislava, Slovakia Slovak University of Technology in Bratislava, Faculty of Informatics and Information Technologies Ilkovicova 3, 842 16, Bratislava, Slovakia Abstract: Social networks, especially Facebook, currently as the largest one, …
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