- Author: Carlos Gussenhoven Haike Jacobs
- Language: English
- Year: 2017
- Author: Carlos Gussenhoven Haike Jacobs
- Language: English
- Year: 2017
- Author: Carlos Gussenhoven Haike Jacobs
- Language: English
- Year: 2011
- Author: Carlos Gussenhoven Haike Jacobs
- Language: English
- Year: 2011
- Author: Carlos Gussenhoven Haike Jacobs
- Language: English
- Year: 2001