Philosophical Investigations (Philosophische Untersuchungen), 1953 work by Ludwig Wittgenstein
•
Philosophical Inquiries into the Essence of Human Freedom (Philosophische Untersuchungen über das Wesen der menschlichen Freiheit), 1809 work by Friedrich Schelling
Philosophische Studien (Philosophical Studies) was the first journal of experimental psychology, founded by Wilhelm Wundt in 1883.
The German TV channel ZDF occasionally produces a philosophical panel discussion in the Transparent Factory, "Das philosophische Quartett" (The Philosophical Quartet).
Vollbrecht, Oliver: Victor Kraft: rationale Normenbegründung und logischer Empirismus: eine philosophische Studie, Munich: Utz 2004 in German.