References
- Winter , J.M. 1989 . “ Causes of war ” . In Aggression and War, Their Biological and Social Bases , Edited by: Groebel , J and Hinde , R.A. Cambridge : University Press .
- Howard , M . 1991 . The Lessons of History , Edited by: Howard , Michael . 139 – 51 . Oxford : Clarendon Press .