1. Ethnicity and Constitutionalism in Contemporary Ethiopia;Abbink;Journal of African Law,1997
2. Sovereignty Regimes: Territoriality and State Authority in Contemporary World Politics;Agnew;Annals of the Association of American Geographers,2005
3. Diversity and State-Building in Ethiopia;Alemseged;African Affairs,2004
4. Ambroso , Guido 1994 The Somali Clan System: An Introduction to Somali Society and History
5. Why Study Borders Now;Anderson;Regional and Federal Studies,2002