- Author: Lars Kierspel
- Language: English
- Year: 2006
- Author: Sverre Böe
- Language: English
- Year: 2001
- Author: Tyler A. Stewart
- Language: English
- Year: 2022
- Author: Manfred Korn
- Language: German
- Year: 1993
- Author: Uta Poplutz Jörg Frey (Hrsg.)
- Language: German
- Year: 2016