- Author: Wilhelm Cuno
- Language: German
- Year: 1923
- Author: May Ernest R
- Language: English
- Year: 2000
- Author: MacArthur Douglas, Morris Seymour
- Language: English
- Year: 2013
- Author: Lai Benjamin, Rava Giuseppe
- Language: English
- Year: 2014
- Author: Uhrskov Frede
- Language: Danish
- Year: 2011
- Author: Uhrskov Frede
- Language: Danish
- Year: 2011
- Author: Juul Clausen Erik
- Language: Danish
- Year: 2005
- Author: Christ Michaela
- Language: German
- Year: 2011
- Author: Bader Marie, Láníček Jan, Löwy Ernst, Ottevanger Kate
- Language: English
- Year: 2019