Severity: Notice
Message: Undefined offset: 0
Filename: controllers/presentation.php
Line Number: 875
Severity: Notice
Message: Trying to get property of non-object
Filename: controllers/presentation.php
Line Number: 875
Author(s):
1. Zdenka Stojanovska, Faculty of Medical Sciences, Goce Delčev University Stip, Macedonia
2. Zoran Ćurguz, Saobraćajni fakultet Doboj,
Republic of Srpska, Bosnia and Herzegovina
3. Predrag Kolarž, Institute of Physics, University of Belgrade, , Serbia
4. Zora S. Zunić, University of Belgrade, Vinča Institute of Nuclear Sciences, Serbia, Serbia