Luka C. Popovic

address: Astronomical Observatory Belgrade, Volgina 7, 11000 Belgrade, Serbia
email: lpopovic@aob.rs

Dragana Ilic

address: Mathematical Faculty Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
email: dilic@matf.bg.ac.rs

Andjelka Kovacevic

address: Mathematical Faculty Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
email: andjelka@matf.bg.ac.rs

Jelena Kovacevic Dojcinovic

address: Astronomical Observatory Belgrade, Volgina 7, 11000 Belgrade, Serbia
email: jkovacevic@aob.rs

Masa Lakicevic

address: Astronomical Observatory Belgrade, Volgina 7, 11000 Belgrade, Serbia
email: mlakicevic@aob.rs

Isidora Jankov

address: Mathematical Faculty Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
email: isidora_jankov@matf.bg.ac.rs

Viktor Radovic

address: Mathematical Faculty Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
email: viktor_radovic@matf.bg.ac.rs

Iva Cvorovic-Hajdinjak

address: Mathematical Faculty Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
email: iva.covorovic@gmail.com

Sasa Simic

address: Faculty of Sciences in Kragujevac, Radoja Domanovica 12, 34000 Kragujevac, Serbia
email: ssimic@kg.ac.rs