- Author: F. Korovkin
- Language: English
- Author: P. P. Korovkin
- Language: English
- Author: Michael Korovkin, Peter Stephenson
- Language: English
- Year: 2010
- Author: F. Korovkin, V. Makarenko
- Language: Kiswahili (Swahili)
- Year: 1988
- Author: N.V. Korovkin V.L. Chechurin M. Hayakawa
- Language: English
- Year: 2007
- Author: F. Korovkin, V. Makarenko
- Language: Kiswahili (Swahili)
- Year: 1988