- Author: Hartmut Elsenhans, Salvatore Babones
- Language: English
- Year: 2017
- Author: Hartmut Elsenhans, Salvatore Babones
- Language: English
- Year: 2017
- Author: Hartmut Elsenhans
- Language: English
- Year: 2021
- Author: Hartmut Elsenhans
- Language: English
- Year: 2014
- Author: Hartmut Elsenhans
- Language: German
- Year: 2009
- Author: Hartmut Elsenhans
- Language: English
- Year: 2011