Njiende, H. D., and N. Fröhleke. “Optimisation of Inductors in Power Converters Feeding High Power Piezoelectric Motors.” Journal of Electrical &; Electronics Engineering, Australia, vol. 22, no. 1, 2002, pp. 25–31.

Kiel, J., et al. “Sensorless Speed Control of Permanent Magnet Synchronous Machines for Low Speed and Standstill.” Power Conversion and Intelligence Motion (PCIM 2002), Nuremberg, Germany, 2002.

Kauczor, C., et al. “Resonant Power Converter for Ultrasonic Piezoelectric Converter, Bremen Germany.” ACTUATOR 2002, 8th International Conference on New Actuators, , 2002.

Yang, B., and H. Grotstollen. “Application, Calculation and Analysis of the Doubly Fed Longstator Linear Motor for the Wheel-on-Rail NBP Test Track.” EPE-PEMC 2002, Dubrovnik &; Cavta, 2002.

Schulte, T., and N. Fröhleke. “PWM-Converter for Travelling Wave Type Ultrasonic Motors.” ACTUATOR 2002, 8th International Conference on New Actuators, Bremen Germany, 2002.

Pottharst, A., and H. Grotstollen. “Konzept Zur Berührungslosen Energieübertragung Mit Doppeltgespeistem Langstatorlinearmotor.” SPS/IPC/Drives 2002, Nürnberg, 2002.

Henke, M., and H. Grotstollen. “Regelung Doppeltgespeister Antriebe Ohne Mechanischen Lagesensor Am Beispiel Eines Linearmotors.” SPS/IPC/Drives 2002, Nürnberg, 2002.

Peckhaus, Volker. “Macfarlane, Alexander (1851–1913).” The Dictionary of Nineteenth-Century British Philosophers, Bd. 2: I–Z, edited by W. J. Manders and Alan P. F. Sell (general editors), Thoemmes Press, 2002, pp. 709–11.

Peckhaus, Volker. “Harley, Robert (1828–1910).” The Dictionary of Nineteenth-Century British Philosophers, Bd. 2: I–Z, edited by W. J. Manders and Alan P. F. Sell (general editors), Thoemmes Press, 2002, pp. 495–96.

Peckhaus, Volker. “Neil, Samuel (1825–1901).” The Dictionary of Nineteenth-Century British Philosophers, Bd. 2: I–Z, edited by W. J. Manders and Alan P. F. Sell (general editors), Thoemmes Press, 2002, pp. 851–52.