1. Battery Electric and Fuel Cell Trains, Maturity of Technology and Market Status;Thorne;TØI report,2020
2. F. Zenith, S. Møller-Holst, M S. Thomassen, 2017, Alternative Railway Electrification in Norway, FCH 2 JU & S2R JU Hydrogen Train Workshop UIC railway statistics synopsis 2021, 2021, UIC
3. P. Clément, F. Degardin, 2017, Hybrid traction, Energy efficiency of future trains UIC Workshop
4. Energy-saving Technology for Railway Traction Systems Using Onboard Storage Batteries;Shimada;Hitachi Review,2012
5. T. Yamamoto, 2017, Trends and recent studies on hybrid railway vehicles, RTRI vol 58