Severity: Notice
Message: Undefined variable: organizer
Filename: controllers/presentation.php
Line Number: 1296
Аутори:
1. Dušanka Marčetić, Природно-математички факултет Бања Лука,
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