1. Department of Public Safety, Government of Brčko District of Bosnia and Herzegovina, Bulevara Mira 1, Brčko 76100, Bosnia and Herzegovina
2. Academy of Applied Studies Belgrade, The College of Tourism, Bulevar Zorana Đinđića 152а, Belgrade 11070, Serbia
3. Military Academy, University of Defence in Belgrade, Veljka Lukica Kurjaka 33, Belgrade 11000, Serbia
4. Faculty of Education, University of East Sarajevo, Semberskih Ratara 1E, Bijeljina 76300, Bosnia and Herzegovina
5. Faculty of Mechanical Engineering and Transport Systems, Technische Universität Berlin, Straße des 17. Juni 135, Berlin 10623, Germany