* Helen Ghebrewebet: "Identifying Units of Statehood and Determining International Boundaries: A Revised Look at the Doctrine of Uti Possidetis and the Principle of Self-Determination", Verlag Peter Lang 2006, ISBN 3-631-55092-8.
* Helen Ghebrewebet: "Identifying Units of Statehood and Determining International Boundaries: A Revised Look at the Doctrine of Uti Possidetis and the Principle of Self-Determination", Verlag Peter Lang 2006, ISBN 3-631-55092-8.