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First Author:
 
Periklis Gogas
Democritus University of Thrace
perrygogas@gmail.com
 
 
 
 

Second Author:

Theophilos Papadimitriou
Democritus University of Thrace
papadi24@gmail.com
 
 
 
 

Third Author:

Elvira Takli
Democritus University of Thrace
taklielvira@gmail.com