Deutsche Bahn plans 25,000 hires in 2020 - Urban Transport Magazine
Berlin orders U-Bahn trains from Stadler Pankow - International Railway Journal
Amazon.com: Metros in Germany: Metros in Europe Pt. 5: Schnellbahnen in Deutschland - U-Bahn, Stadtbahn, S-Bahn (English and German Edition) by Robert Schwandl (2007-04-16): Libros