Published by the University of Niš, Serbia
e-mail: facta@ni.ac.rs

Secretary: Olgica Davidović, olgicad@ni.ac.rs, University of Niš
Computer support: Mile Ž. Ranđelović, mile@ni.ac.rs & Miloš Babić milosb@ni.ac.rs University of Niš

Financial support: Ministry of Science and Technological Development of the Republic of Serbia
Distribution through the University Library "Nikola Tesla" - Niš