1. Modeling and analysis of a stair case lift for material handling system;avinash;International Journal of Innovative Research in Science Engineering and Technology,2013
2. Safety Standard for Platform Lifts and Stairway Chairlifts;engineers;An American National Standard,2008
3. Safety Standard for Platform Lifts and Stairway Chairlifts;engineers;An American National Standard,2008
4. Safety Code for Elevators and Escalators;engineers;An American National Standard,2004