Doktorarbeiten
. 2011. Okrika: Igbo trade networks and secondhand clothing. Doktorarbeit, Philosophische Fakultät I, Seminar für Ethnologie, Martin-Luther-Universität Halle-Wittenberg, Halle/Saale.
. Negotiating identity: politics of identification among the Borana, Gabra and Garri around the Oromo-Somali boundary in Southern Ethiopia. Doktorarbeit, Martin-Luther-Universität Halle-Wittenberg, Halle/Saale.
. Ethnic groups and conflict: the case of the Anywaa-Nuer relations in the Gambela Region, Western Ethiopia. Doktorarbeit, Martin-Luther-Universität Halle-Wittenberg, Halle/Saale.