1. 1 University of Zilina , Faculty of Security Engineering , Univerzitna 1 , Zilina , Slovakia
2. 2 Ambis.University , Lindnerova 575/1, 180 00 Praha 8 Libeň , Czech Republic
3. 3 University of Zilina , Faculty of Security Engineering , Univerzitna 1, 010 26 Zilina , Slovakia