Bower et al. 2012, Section 3.1.2 (pp. 95–96, in work pp. 102–103). Bower, Ed; Schönau, Niko; Skipton-Carter, Andy; Buchanan, Jim; Bradbury, Trevor; Barlow, Tim; Ramdas, Vijay (14 March 2012). GB Rail Powertrain Efficiency Improvements(PDF). Shoreham-by-Sea: Ricardo plc. Archived from the original(PDF) on 6 September 2012. Retrieved 2 December 2022.
Bower et al. 2012, Section 3.1.2 (pp. 95–96, in work pp. 102–103). Bower, Ed; Schönau, Niko; Skipton-Carter, Andy; Buchanan, Jim; Bradbury, Trevor; Barlow, Tim; Ramdas, Vijay (14 March 2012). GB Rail Powertrain Efficiency Improvements(PDF). Shoreham-by-Sea: Ricardo plc. Archived from the original(PDF) on 6 September 2012. Retrieved 2 December 2022.