- Author: L. A. Lyusternik, A. R. Yanpol'skii
- Language: English
- Year: 2014
- Author: Brown Donald Edward, Lyusternik Lazar' Aronovich, Spence E., Yanpol'skii Avraam Ruvimovich
- Language: English
- Year: 1965
- Author: Lyusternik L. A., Yanpol'Skii A. R.
- Language: English
- Year: 2014