- Author: В.А. Вахрамеев
- Language: Русский
- Year: 1988
- Author: Martin Alexander C. and William D. Barkley
- Language: English
- Year: 1961
- Author: Beerling D. J
- Language: English
- Year: 2006
- Author: Patricia G. Gensel, Dianne Edwards
- Language: English
- Year: 2001