Schultze, A. 1913. The sultanate of Bornu, translated from the German, with additions and appendices by P. Askell Benton. London, Oxford University Press. pp. 1-401.
Schultze, A. 1910. Das Sultanat Bornu mit besonderer Berücksichtigung Deutsch-Bornus. Bonn, Langensalza. pp. 1-128.






