- Author: Einar Smith
- Language: English
- Year: 2022
- Author: Einar Smith
- Language: English
- Year: 2022
- Author: Einar Smith
- Language: English
- Year: 2020
- Author: Einar Smith
- Language: English
- Year: 2021
- Author: Einar Smith (auth.)
- Language: English
- Year: 2015
- Author: Einar Smith (auth.)
- Language: German
- Year: 2014
- Author: Dr. Einar Smith (auth.)
- Language: German
- Year: 1996