- Author: Thiemo Breyer (editor), Thomas Widlok (editor)
- Language: English
- Year: 2018
- Author: Thomas Widlok (editor) Wolde Gossa Tadesse (editor)
- Language: English
- Year: 2004
- Author: Thomas Widlok (editor) Wolde Gossa Tadesse (editor)
- Language: English
- Year: 2004