- Author: P. Ya. Ufimtsev
- Language: English
- Year: 1962
- Author: Pyotr Ya. Ufimtsev
- Language: English
- Year: 2014
- Author: Pyotr Ya. Ufimtsev
- Language: English
- Year: 2007
- Author: Pyotr Ya. Ufimtsev
- Language: English
- Year: 2007
- Author: Pyotr Ya. Ufimtsev
- Language: English
- Year: 2007