1. Faculty of Philosophy, University of East Sarajevo,1 Alekse Santica,Pale,Bosina and Herzegovina,71420
2. University of Belgrade, 12-14 Mike Petrovica Alasa,Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia,Belgrade,Serbia,11000
3. Deutsches Zentrum für Luft- und Raumfahrt (DLR), Rutherfordstraße 2,Berlin,12489