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Severity: Notice
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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. Andreja Ilić, Lithuania
2. Lozica Ivanović, Fakultet inženjerskih nauka Univerziteta u Kragujevcu, Serbia
3. Danica Josifović, Fakultet inženjerskih nauka Univerziteta u Kragujevcu, Serbia
4. Vukić Lazić, Fakultet inženjerskih nauka Univerziteta u Kragujevcu, Serbia
5. Boris Rakić, Fakultet inženjerskih nauka Univerziteta u Kragujevcu, Serbia
Applied paper from author