1. (1) A. Jöckel: “Active Damping of Mechanical Vibrations in Drive Systems of Three-Phase AC Locomotives”, (in German), in ZEVrail Glasers Annalen 125, No. 5, Georg Siemens Verlag, Germany (2001)
2. (2) H.-P. Beck and B. Engel: German Patent DE 44 35 775 C2, German Patent Office (1994)
3. (3) L. A. Contreras Carranza: “Unterdrückung selbsterregter Schwingungen in Radsatzantrieben elektrischer Lokomotiven”, Schwingungen in Antrieben '98, VDI Berichte No. 1416 (1998)
4. (4) G. Amler, G. Stanke, F. Sperr, M. Weidauer, and F. Hoffmann: “Highly dynamic and speed sensorless control of traction drives”, in Proc. EPE '03, Toulouse, France (2003)
5. (5) M. Fleischer: “Reduced model identification and parameter estimation for traction drive-trains”, IEEJ IAS, Journal, Vol. 4, No. 4 (2015)