1. The Vertical Transportation Handbook,2010
2. European Lift Association, Statistical, [Online]. Available: 〈http://ela-aisbl.eu/images/Statistical_Committee_GA_2016_for_website_final.pdf〉. (Accessed 12 May 2017).
3. Energy Performance of Lifts, Escalators and Moving Walks. Part 1: Energy Measurement and Verification. ISO 25745-1, 2012.
4. Energy Performance of Lifts, Escalators and Moving Walks, Part 3: Energy Calculation and Classification of Escalators and Moving Walks. ISO 25745-3, 2015.
5. Energy consumption and service performance of escalators;Markos;FME Trans.,2016