Buzan, Barry <br/><br/>
Regions and powers  : the structure of international security 
/ Barry Buzan [London School of Economics] and Ole Waev.er [Univ.ersity of Copenhagen] 
 - 5. reimpr. 
 - Cambridge  Cambridge University Press 
 - xxiv., 570 p. 
 - Cambridge Studies in International Relations  n. 91 .