"Bane Energi". jernbaneverket. Archived from the original on 5 October 2015. Retrieved 29 July 2015.
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C. Linder (2002). "Umstellung der Sollfrequenz im zentralen Bahnstromnetz von 16 2/3 Hz auf 16,70 Hz" [Switching the frequency in train electric power supply network from 16 2/3 Hz to 16.70 Hz]. Elektrische Bahnen (in German). 12. ISSN0013-5437.