- Author: Holmes Catherine V
- Language: English
- Year: 2015
- Author: Sonnberger Thomas
- Language: German
- Year: 2016
- Author: Keck Gecko
- Language: German
- Year: 2016
- Author: Flemming Kai
- Language: German
- Year: 2013
- Author: Albert Greg
- Language: English
- Year: 1994
- Author: Gansterer Nikolaus
- Language: English
- Year: 2011
- Author: Bardel William, Baskinger Mark
- Language: English
- Year: 2013