1. Electric Locomotive Classes – AC WAP7 and WAP-5, 2009, http://www.irfca.org/faq/faq-loco2e.html (accessed 19 May 2016)
2. S. Pitroda, D. parekh, M. S. Verma, R. Lall, G. Raghuram, V. Chatterjee, R. Jain, Report of the Expert Group for Modernizaion of Indian Railways, Ministry of Railways, Government of India 2012
3. Indian locomotive class WAP-5, 2015; https://en.wikipedia.org/wiki/Indian˙locomotive˙class˙WAP-5 (accessed 03 July 2015)
4. Indian locomotive class WAP-7, 2015 https://en.wikipedia.org/wiki/Indian˙locomotive˙class˙WAP-7 (accessed 03 July 2016)
5. C. Colin, Longitudinal Train Dynamics, Handbook of Railway Vehicle Dynamics, CRC Press 2006, pp. 239–277