Greek Bibliography 

 - Athens :  Ministry to the Prime Minister's Office 
 - v. 
<br/><br/> CAICYT 
<br/><br/><label>ISSN: </label>0017-3851 
<br/><br/><label>Standard No.: </label>RELAP00043 
<br/><br/><label>Universal Decimal Class. No.: </label>010