
- Author: Thomas Rawlings (auth.) Eduard Pelz (ed.)
- Language: German
- Year: 1866

- Author: Friedrich Pauer
- Language: German
- Year: 1846

- Author: H. Neelmeyer-Vukassowitsch
- Language: German
- Year: 1884

- Author: Hugo Münsterberg
- Language: English
- Year: 1902

- Author: Hugo Münsterberg
- Language: German
- Year: 1909

- Author: Karl Knortz
- Language: German
- Year: 1903