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. Svjetlana Sredić, Rudarski fakultet Prijedor,
Republic of Srpska, Bosnia and Herzegovina
2. Ljiljana Tankosic, Rudarski fakultet Prijedor,
Republic of Srpska, Bosnia and Herzegovina
3. Nadezda Calic, Rudarski fakultet Prijedor,
Republic of Srpska, Bosnia and Herzegovina