- Author: Andrei A. Agrachev, Yuri Sachkov
- Language: English
- Year: 2010
- Author: Andrei A. Agrachev, Yuri Sachkov
- Language: English
- Year: 2010
- Author: Andrei A. Agrachev Yuri L. Sachkov (auth.)
- Language: English
- Year: 2004
- Author: Andrei A. Agrachev Yuri Sachkov Andrei Agrachev
- Language: English
- Year: 2004