1. Kone Q4 Financial Statement Bulletin 2013, Technical Report, Kone, 2014.
2. ISO 18738-1:2012 Measurement of Lift Ride Quality—Part 1: Lifts (Elevators), 2012.
3. Analysis of elevator ride quality, vibration;Lorsbach;Elevator World,2003
4. EVA-625 Elevator Vibration Analysis System, Technical Report, PMT Europe, 2010.
5. Modules for safe and sure operation, monitoring and documentation in elevators;Pini;Lift Rep.,2005