V. Peckhaus, “Paradoxes in Göttingen,” in One Hundred Years of Russell’s Paradox. Mathematics, Logic, Philosophy, vol. 6, G. Link, Ed. Berlin/New York: de Gruyter, 2004, pp. 501–515.

V. Peckhaus, “Garantiert Widerspruchsfreiheit Existenz?,” in Was folgt? Themen zu Wessel, B. Christiansen and U. Scheffler, Eds. Berlin: Logos Verlag, 2004, pp. 111–127.

V. Peckhaus, “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.), vol. 25, pp. 3–14, 2004.

V. Peckhaus, “Dignaga’s Logic of Invention,” in History of the Mathematical Sciences, I. Grattan-Guinness and B. S. Yadav, Eds. New Delhi: Hindustan Book Agency, 2004, pp. 97–107.

V. Peckhaus, “Schröder’s Logic,” in Handbook of the History of Logic, Bd. 3: The Rise of Modern Logic: From Leibniz to Frege, D. M. Gabbay and J. Woods, Eds. Amsterdam u. a.: Elsevier North Holland, 2004, pp. 557–609.

V. Peckhaus, “Scholz als Metaphysiker,” in Heinrich Scholz: Logiker, Philosoph, Theologe, H.-C. Schmidt am Busch and K. F. Wehmeier, Eds. Paderborn: mentis-Verlag, 2004, pp. 69–83.

V. Peckhaus, “Who was Wilhelm Schlötel?,” in Filosofisia tutkielmia - Philosophical Studies in honorem Leila Haaparanta, K. Luoma, E. Oesch, and R. Vilkko, Eds. Tampere: Tampere University Press, 2004, pp. 285–296.

F. Schafmeister and J. 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), Aachen, Germany, 2004, vol. 4, pp. 2917–2923.

P. Ide, F. Schafmeister, N. Fröhleke, and H. Grotstollen, “Enhanced Control Scheme for Three-Phase / Three-Level Rectifiers at Partial Load,” in Proc. 35th IEEE Power Electronics Specialists Conference (PESC), Aachen, Germany, 2004, vol. 1, pp. 207–213.

F. Schafmeister and J. Kolar, “Novel Hybrid Modulation Schemes Extending the Reactive Power Control Range of Conventional and Sparse Matrix Converters Operating at Maximum Output Voltage,” presented at the  International Power Electronics and Motion Control Conference (EPE-PEMC), Riga, Latvia, 2004.

J. Böcker, N. Amann, and B. Schulz, “Active Suppression of Torsional Oscillations,”10.1016/s1474-6670(17)31123-0__IFAC Proceedings Volumes, vol. 37, no. 14, pp. 319–324, 2004, doi:10.1016/s1474-6670(17)31123-0 .

N. Amann, J. Böcker, and F. Prenner, “Active Damping of Drive Train Oscillations for an Electrically Driven Vehicle,”10.1109/tmech.2004.839036__IEEE/ASME Transactions on Mechatronics, vol. 9, no. 4, pp. 697–700, 2004, doi:10.1109/tmech.2004.839036 .

J. Böcker, “Tolerance band controller for a three-level four-quadrant converter including DC link balancing,”10.1109/pesc.2004.1354749__presented at the PESC, Aachen, 2004, doi:10.1109/pesc.2004.1354749 .

H. D. Njiende, N. Fröhleke, and J. Böcker, “Derivation of integrated magnetic components using reluctance and mathematical modeling,”10.1109/pesc.2004.1354859__2004, doi:10.1109/pesc.2004.1354859 .

C. Kauczor and N. Fröhleke, “Inverter topologies for ultrasonic piezoelectric transducers with high mechanical Q-factor,”10.1109/pesc.2004.1355265__2004, doi:10.1109/pesc.2004.1355265 .

H. Wetzel, A. Siegel, H. Njiende, N. Fröhleke, and J. Böcker, “Low Voltage Asymmetrical Half-Bridge Converter with Integrated Magnetics,” presented at the 11th International Power Electronics and Motion Control Conferences, Riga, Latvia, 2004.

B. Schulz, A. Pottharst, N. Fröhleke, and J. Böcker, “Modelling of Influences to a Linear-Drive-System,” presented at the 11th International Power Electronics and Motion Control Conferences, Riga, Latvia, 2004.

A. Pottharst, K. Baptist, O. Schütze, J. Böcker, N. Fröhleke, and M. Dellnitz, “Operating Point Assignment of a Linear Motor Driven Vehicle Using Multiobjective Optimization Methods,” presented at the 11th International Power Electronics and Motion Control Conferences, Riga, Latvia, 2004.

R. Li, A. Pottharst, N. Fröhleke, and J. Böcker, “Energy Storage Scheme for Rail-guided Shuttle using Ultracapacitor and Battery,” presented at the 11th International Power Electronics and Motion Control Conferences, Riga, Latvia, 2004.

R. Li, A. Pottharst, N. Fröhleke, and J. Böcker, “Analysis and Design of Improved Isolated Full-Bridge Bi-Directional DC-DC Converter,” presented at the PESC 2004, Aachen, Germany, 2004.