- Author: George Kudrayvtsev
- Language: English
- Year: 2020
- Author: George Kudrayvtsev
- Language: English
- Year: 2018
- Author: George Kudrayvtsev
- Language: English
- Year: 2018
- Author: Stefan Haller
- Language: German
- Year: 2013
- Author: Stefan Haller
- Language: German
- Year: 2013
- Author: N.D. Elkies
- Language: English
- Year: 2015