Under CopyrightWietschel, M.M.WietschelSeydel, P.P.SeydelBünger, U.U.BüngerWurster, R.R.Wurster2022-03-1017.08.20062006https://publica.fraunhofer.de/handle/publica/35132210.24406/publica-fhg-351322en303600European hydrogen energy roadmap (HyWays)conference paper