Peckhaus, Volker. “Paradoxes in Göttingen.” In One Hundred Years of Russell’s Paradox. Mathematics, Logic, Philosophy, edited by Godehard Link, 6:501–15. De Gruyter Series in Logic and Its Applications. Berlin/New York: de Gruyter, 2004.

Peckhaus, Volker. “Garantiert Widerspruchsfreiheit Existenz?” In Was folgt? Themen zu Wessel, edited by Bente Christiansen and Uwe Scheffler, 111–27. Logische Philosophie. Berlin: Logos Verlag, 2004.

Peckhaus, Volker. “Calculus Ratiocinator vs. Characteristica Universalis? The Two Traditions in Logic, Revisted.” History and Philosophy of Logic (Special Issue in Honor of Ivor Grattan-Guinness, Hg. v. John W. Dawson, Jr.) 25 (2004): 3–14.

Peckhaus, Volker. “Dignaga’s Logic of Invention.” In History of the Mathematical Sciences, edited by Ivor Grattan-Guinness and B. S. Yadav, 97–107. New Delhi: Hindustan Book Agency, 2004.

Peckhaus, Volker. “Schröder’s Logic.” In Handbook of the History of Logic, Bd. 3: The Rise of Modern Logic: From Leibniz to Frege, edited by Dov M. Gabbay and John Woods, 557–609. Amsterdam u. a.: Elsevier North Holland, 2004.

Peckhaus, Volker. “Scholz als Metaphysiker.” In Heinrich Scholz: Logiker, Philosoph, Theologe, edited by Hans-Christoph Schmidt am Busch and Kai F.  Wehmeier, 69–83. Paderborn: mentis-Verlag, 2004.

Peckhaus, Volker. “Who Was Wilhelm Schlötel?” In Filosofisia Tutkielmia - Philosophical Studies in Honorem Leila Haaparanta, edited by Kaisa Luoma, Erna Oesch, and Risto Vilkko, 285–96. Acta Philosofica Tamperensia. Tampere: Tampere University Press, 2004.

Schafmeister, Frank, and Johann Kolar. “Novel Modulation Schemes for Conventional and Sparse Matrix Converters Facilitating Reactive Power Transfer Independent of Active Power Flow.” In Proc. 35th IEEE Power Electronics Specialists Conference (PESC), 4:2917–23. Aachen, Germany: IEEE, 2004.

Ide, Peter , Frank Schafmeister, Norbert Fröhleke, and Horst Grotstollen. “Enhanced Control Scheme for Three-Phase / Three-Level Rectifiers at Partial Load.” In Proc. 35th IEEE Power Electronics Specialists Conference (PESC), 1:207–13. Aachen, Germany: IEEE, 2004.

Schafmeister, Frank, and Johann Kolar. “Novel Hybrid Modulation Schemes Extending the Reactive Power Control Range of Conventional and Sparse Matrix Converters Operating at Maximum Output Voltage.” In Proc. 11th International Power Electronics and Motion Control Conference (EPE-PEMC). Riga, Latvia: EPE, 2004.