- Author: Ulrich Burgard, Walther Hadding, Peter O. Mülbert, Michael Nietsch, Reinhard Welter (editors)
- Language: German
- Year: 2011
- Author: Walther Hadding, Klaus J. Hopt, Herbert Schimansky
- Language: German
- Year: 2003
- Author: Walther Hadding (editor), Klaus J. Hopt (editor)
- Language: German
- Year: 1993
- Author: Walther Hadding (editor), Klaus J. Hopt (editor), Herbert Schimansky (editor)
- Language: German
- Year: 2001
- Author: Walther Hadding (editor), Klaus J. Hopt (editor)
- Language: German
- Year: 1991