- Author: Henrik Voß
- Language: German
- Year: 2011
- Author: Jesús Padilla Gálvez (editor)
- Language: English
- Year: 2008
- Author: Alexander Hieke (editor), Hannes Leitgeb (editor)
- Language: English
- Year: 2009
- Author: Elena Tatievskaya
- Language: German
- Year: 2009