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Weigand, Wolfgang (18 March 2008). "Mixed traffic on high speed lines in Germany"(PDF) (lecture document for UIC Highspeed Congress, Amsterdam). DB Netz AG. Archived from the original(PDF) on 1 February 2012. Retrieved 30 August 2023.
"Zielfahrplan Deutschland-Takt"(PDF) (Zweiter Gutachterentwurf Fernverkehr) (in German). SMA und Partner AG. 7 May 2019. Archived from the original(PDF) on 20 June 2019. Retrieved 30 August 2023.
Weigand, Wolfgang (18 March 2008). "Mixed traffic on high speed lines in Germany"(PDF) (lecture document for UIC Highspeed Congress, Amsterdam). DB Netz AG. Archived from the original(PDF) on 1 February 2012. Retrieved 30 August 2023.