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2. Graphic and Tech Documentation available on Thales official site.
https://www.thalesgroup.com/en/european-train-control-system-etcs
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5. Pugi, L., Malvezzi, M., Tarasconi, A., Palazzolo, A., Cocci, G., Violani, M.: HIL simulation of WSP systems on MI-6 test rig. Vehicle Syst. Dyn. 44(sup1), 843–852 (2006)