1. 1 Aurel Vlaicu University of Arad , Arad , Romania
2. 2 Aurel Vlaicu University of Arad , Arad , Romania
3. 3 Aurel Vlaicu University of Arad , Arad , Romania
4. 4 Bucharest University of Economic Studies , Bucharest , Romania
5. 5 Aurel Vlaicu University of Arad , Arad , Romania
6. 6 Adlai E. Stevenson High School in Lincolnshire , Illinois , USA