1. Opportunities for elevator energy efficiency improvements;Sachs;American Council for an Energy-Efficient Economy,2005
2. Advancing elevator energy efficiency;Sachs,2015
3. Real-time monitoring of elevators to reduce redundant stops and energy wastage;Sahin;Optimization,2013
4. Energy efficient elevators and escalators;Patrão
5. Method and call system for remotely communicating with an elevator in prediction of a passenger;Puskala,2009