(en) Asnake Kefale Adegehe, « Transformation in Gumuz-Amhara relations : Mentawuha and Mandura », dans Federalism and ethnic conflict in Ethiopia : a comparative study of the Somali and Benishangul-Gumuz regions (Doctoral Thesis), Leiden University, (résumé, lire en ligne [PDF]), p. 219-223