1. Sustainability and carbon reduction on electrified railways
2. Anderson, R.: ‘Maximizing the potential for metros to reduce energy consumption and deliver low-carbon transportation in cities’, (MetroRail Asia, Delhi 2009 September)
3. ‘Evaluation of energy efficiency technologies for rolling stock and train operation of railways (EVENT) – Final Report’. Institute for Futures Studies and Technology Assessment, Berlin, March 2003
4. Line voltage regulation of urban transit systems using supercapacitors