Department of Mathematics and Informatics
Faculty of Sciences
University of Novi Sad
Trg Dositeja Obradovića 3
21000 Novi Sad, SERBIA
e-mail: samir@dmi.uns.ac.rs
![](https://personal.pmf.uns.ac.rs/samir.zahirovic/wp-content/uploads/sites/43/2020/02/keleti1.jpg)
Department of Mathematics and Informatics
Faculty of Sciences
University of Novi Sad
Trg Dositeja Obradovića 3
21000 Novi Sad, SERBIA
e-mail: samir@dmi.uns.ac.rs