- Author: Rodolfo Console Alexei Nikolaev
- Language: English
- Year: 1995
- Author: Nikolaev Igor V.
- Language: English
- Year: 2017
- Author: Petko Hristov Petkov, Tsonyo Nikolaev Slavov, Jordan Konstantinov Kralev
- Language: English
- Year: 2018
- Author: Igor V. Nikolaev
- Language: English
- Year: 2017
- Author: Evgeniĭ Nikolaev
- Language: German
- Year: 1983
- Author: I. Nikolaev, V. Israelian
- Language: Spanish
- Year: 1962
- Author: Djadjev Ilian Nikolaev
- Language: English
- Year: 2017
- Author: Nikolaev Viacheslav, Zaccolo Manuela
- Language: English
- Year: 2017
- Author: Igor Nikolaev
- Language: English
- Year: 2001
