- Author: Lutz Küster Ulrich Krämer
- Language: German
- Year: 2013
- Author: Blake Brian, Cabral Liliana, König-Ries Birgitta, Küster Ulrich, Martin David
- Language: English
- Year: 2012
- Author: Cabral Liliana, König-Ries Birgitta, Küster Ulrich, Martin David, Blake M. Brian
- Language: English
- Year: 2012