- Author: John Solomon
- Language: English
- Year: 2020
- Author: Friedrich Bodenstedt
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- Year: 1845
- Author: Stephen Cohen
- Language: English
- Year: 2018
- Author: Mark Galeotti
- Language: English
- Year: 2019
- Author: Erik S. Herron
- Language: English
- Year: 2020
- Author: Taras Kuzio
- Language: English
- Year: 2022
- Author: Alexei W. Sekarev
- Language: German
- Year: 1992
- Author: Eberhard Schneider Heinz Timmermann
- Language: German
- Year: 1991