- Author: Nicholas Kotar
- Language: English
- Year: 2019
- Author: S.L. Kotar, J.E. Gessler
- Language: English
- Year: 2017
- Author: S. L. Kotar J. E. Gessler
- Language: English
- Year: 2010
- Author: John of Kronstadt, Nicholas Kotar, E E Goulaeff
- Language: English
- Year: 2015
- Author: Kotar S. L., Gessler J. E
- Language: English
- Year: 2011
- Author: S.L. Kotar J.E. Gessler
- Language: English
- Year: 2013
- Author: S.L. Kotar J.E. Gessler
- Language: English
- Year: 2014
- Author: S. L. Kotar J. E. Gessler
- Language: English
- Year: 2009
