1Steiner, M, ; Scholten, J. ; Steinegger, H. ; Jenewein, T. : Energy Storage Systems for Improved Efficiency of Railway Vehicles.WCRR, Koln 2001.
2Hentschel, F, ; Mueller, K. ; Steiner, M. : Energy Storage on Urban Railway Vehicles. UIC Railway Efficiency Conference, May2000,
3Steiner, M.; Schohen, J. : Energy Storage - Energiespeicher auf Gleichstrom-Schienenfahrzeugen, Elektrische Bahnen eb 101(2003) Heft 12, S. 533-538.
4Pereira, G. ; Barthoiomeus, P, ; Le Moigne, P. ; Rombaut, C. ;van Berten, P. : Ultracapacitors and tramway without catenary. 2nd BOOSTCAP Meeting, Fribourg (CH) 2001.
5Engel, B. : The Innovative traction system with the flywheel of the LIREX. WCRR, Kolin 2001.
6Steiner, M. ; Schohen, J. : Energy Storage on board of Railway Vehicles. Nordic Rail Conference, Jonkoping 2003.