Severity: Notice
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Filename: controllers/presentation.php
Line Number: 1296
Author(s):
1. Dušanka Marčetić, Prirodno-matematički fakultet Banja Luka,
Republic of Srpska, Bosnia and Herzegovina
2. Sunčica Elezović-Hadžić, University of Belgrade, Faculty of Physics, Serbia
3. Ivan Živić, Univerzitet u Kragujevcu, Prirodno-matematički fakultet, , Serbia