- Author: Kharshiing J & Bodhi S.R
- Language: English
- Year: 2019
- Author: Henry Pease
- Language: Spanish
- Year: 2008
- Author: Europäische Union., Bersick Sebastian
- Language: English
- Year: 2006
- Author: М. Л. Хазин С. И. Щеглов
- Language: Русский
- Year: 2016
- Author: C. Jon Delogu
- Language: English
- Year: 2014
- Author: Mark Hertsgaard
- Language: English
- Year: 2016
- Author: Joshua C. Hall
- Language: English
- Year: 2019