- Author: Wolfgang Engel
- Language: English
- Year: 2014
- Author: Wolfgang Engel
- Language: English
- Year: 2010
- Author: Wolfgang Engel
- Language: English
- Year: 2012
- Author: Wolfgang Engel
- Language: English
- Year: 2006
- Author: Wolfgang Engel Amir Geva
- Language: English
- Year: 2001
- Author: Wolfgang (Wolfgang Engel) Engel
- Language: English
- Year: 2005
- Author: Wolfgang Engel
- Language: English
- Year: 2003
- Author: Wolfgang Engel
- Language: English
- Year: 2004
- Author: Wolfgang Engel
- Language: English
- Year: 2003