- Author: Markus Enders (Hrsg.)
- Language: German
- Year: 2019
- Author: Jürgen Hasse (Hrsg.)
- Language: German
- Year: 2019
- Author: Kristin Theresa Drechsler
- Language: German
- Year: 2021
- Author: Élodie Lecuppre-Desjardin
- Language: English
- Year: 2022
- Author: Paul H. Neuhaus
- Language: German
- Year: 1976
- Author: Nalova Lyonga, Eckhard Breitinger, Bole Butake
- Language: English, French
- Year: 1993
- Author: Simon Underdown
- Language: English
- Year: 2018
- Author: Charles Esdaile
- Language: English
- Year: 2017