Institution: | 1.Faculty of Organizational Sciences,Univesity of Belgrade and Astronomical Observatory,Belgrade 74,Serbia;2.Astronomical Observatory,Belgrade 74,Serbia;3.Institute of Physics,Univesity of Belgrade,Belgrade,Serbia;4.Astronomical Observatory, Volgina 7, 11060 Belgrade 74, Serbia and Observatoire de Paris,Meudon Cedex,France;5.IHIS Techno Experts,Batajni?ki put 23,Zemun,Serbia;6.Innovation Centre of Faculty of Technology and Metallurgy,University of Belgrade,Belgrade,Serbia |