- Author: Georg Bitter, Marcus Lutter, Hans-Joachim Priester, Wolfgang Schön, Peter Ulmer (editors)
- Language: German
- Year: 2009
- Author: Marcus Lutter (editor), Hans-Joachim Mertens (editor), Peter Ulmer (editor)
- Language: German
- Year: 1985
- Author: Peter Ulmer, Mathias Habersack, Carsten Schäfer, Wolfgang Schilling, Jürg Zutt, Volker Kluge
- Language: German
- Year: 2005
- Author: Robert Fischer, Peter Ulmer
- Language: German
- Year: 1971
- Author: Peter Ulmer (auth.) Professor Dr. Reiner Wiehl (eds.)
- Language: German
- Year: 1992