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"Broschüre 50 Jahre U-Bahn" [Brochure 50 years U-Bahn]. kvb.koeln (in German). 11 October 2018. Archived from the original on 6 July 2022. Retrieved 5 July 2022.
Anemüller, Stephan (21 November 2017). "Linie 16 – eine Bahn mit Geschichte" [Line 16 – a line with history]. Der Unternehmensblog der KVB (in German). Archived from the original on 18 September 2021. Retrieved 5 July 2022.
Anemüller, Stephan (31 January 2017). "Linie 7: An der Sonne und über die Grenzen der Stadt" [Line 7: At the sun and beyond the city's limits]. Der Unternehmensblog der KVB (in German). Archived from the original on 18 January 2022. Retrieved 5 July 2022.
Schmitz, Alfried (11 December 2019). "Archäologie: "ZeitTunnel" Köln" [Archaeology: "TimeTunnel" Cologne]. planet-wissen.de (in German). Archived from the original on 19 March 2021. Retrieved 4 July 2022.
Weiß, Regina (12 June 2018). "Von Ost nach West von West nach Ost – die Linie 1" [From east to west from west to east – line 1]. Der Unternehmensblog der KVB (in German). Archived from the original on 18 September 2021. Retrieved 6 July 2022.
Pesch, Matthias (16 August 2016). "Meine Linie: die Linie 9" [My line: line 9]. Der Unternehmensblog der KVB (in German). Archived from the original on 9 December 2022. Retrieved 17 February 2023.
Anemüller, Stephan (20 January 2023). "Linie 15: Seit 20 Jahren entlang der Stadtmauer" [Line 15: 20 years along the city wall]. Der Unternehmsblog der KVB (in German). Archived from the original on 5 February 2023. Retrieved 17 February 2023.
Pesch, Matthias (5 July 2016). "Was Sie noch nicht über die KVB wussten..." [Things you didn't know about the KVB...]. Der Unternehmensblog der KVB (in German). Archived from the original on 28 January 2023. Retrieved 16 February 2023.
Pesch, Matthias (16 February 2016). "Wo ist die Linie 11 geblieben?" [Where did line 11 go?]. Der Unternehmensblog der KVB (in German). Archived from the original on 18 January 2022. Retrieved 26 July 2022.
Machnik, Maria (9 December 2013). "Infrastruktur: Mehr Stellplätze in Weiden-West?" [Infrastructure: More parking space in Weiden-West?]. Kölner Stadt-Anzeiger (in German). Archived from the original on 18 June 2022. Retrieved 25 July 2022.
"Broschüre Zweite Baustufe" [Brochure second building stage]. Nord-Süd Stadtbahn Köln (in German). Archived from the original on 25 July 2022. Retrieved 7 July 2022.
"3. Baustufe Nord-Süd-Stadtbahn" [3rd building stage North-South rail]. Nord-Süd Stadtbahn Köln (in German). November 2017. Archived from the original on 7 July 2022. Retrieved 7 July 2022.
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Meyer, Gudrun (24 February 2021). "Gleiswechsel Waidmarkt". Der Unternehmensblog der KVB (in German). Archived from the original on 17 September 2021. Retrieved 6 July 2022.
Meyer, Gudrun (14 March 2018). "Ausbau der Ost-West-Achse Kölns große Chance" [Expansion of the East-West-Axis Cologne's big chance]. Der Unternehmensblog der KVB (in German). Archived from the original on 17 January 2021. Retrieved 6 July 2022.
"Touren ohne Treppen Flyer" [Routes without steps]. Kölner Verkehrs Betriebe AG. December 2021. Archived from the original on 26 July 2022. Retrieved 26 July 2022.
"Niederflurfahrzeuge" [Low floor trains]. kvb.koeln (in German). Archived from the original on 17 June 2022. Retrieved 6 July 2022.
Claus Boelen-Partile (14 August 2015). "Der Zug ist noch nicht abgefahren" [The train has not yet been moved]. Archived from the original on 5 July 2022. Retrieved 28 August 2017.
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Attenberger, Tim; Hahn, Sebastian; Pichireddu, Sara; Görtz, Oliver (9 October 2022). "Sechs Personen nach Feuer am Ebertplatz verletzt" [Six people injured after fire at Ebertplatz]. Kölner Stadt-Anzeiger (in German). Archived from the original on 23 November 2022. Retrieved 23 November 2022.
"33 KVB-Bahnen fallen aus – So reagieren die Kölner" [33 KVB-trains not operating – how Cologne's residents react]. Kölner Stadt-Anzeiger (in German). 28 October 2022. Archived from the original on 23 November 2022. Retrieved 23 November 2022.
Attenberger, Tim (10 November 2022). "KVB setzt Hochflurbahnen wieder im Kölner Netz ein" [KVB resumes operation of high-floor trains in Cologne]. Kölner Stadt-Anzeiger (in German). Archived from the original on 23 November 2022. Retrieved 23 November 2022.
Anemüller, Stephan (11 May 2021). "Serie 2400 komplett, viel Geld gespart" [Series 2400 finished, a lot of money saved]. Der Unternehmensblog der KVB (in German). Archived from the original on 18 September 2021. Retrieved 27 July 2022.
"Hochflurfahrzeuge" [High floor vehicles]. Kölner Verkehrs-Betriebe AG (in German). Archived from the original on 17 June 2022. Retrieved 26 July 2022.
Anemüller, Stephan (25 May 2021). "Neue Heimat für 64 Stadtbahnen". Der Unternehmensblog der KVB. Archived from the original on 18 September 2021. Retrieved 27 July 2022.
"Leitstelle" [Control room]. Kölner Verkehrs-Betriebe AG (in German). Archived from the original on 5 November 2015.
Anemüller, Stephan (28 February 2022). "Signale und Zeichen der KVB – eine Einführung" [Signals of the KVB – an introduction]. Der Unternehmensblog der KVB (in German). Archived from the original on 1 March 2022. Retrieved 28 July 2022.
"PM DFI-Anzeiger" [Press report DFI-displays]. Kölner Verkehrs-Betriebe AG (in German). 28 February 2020. Archived from the original on 28 July 2022. Retrieved 27 July 2022.