1. OSHA: Industrial Robots and Robot System Safety, Section IV, Chapter 4, OSHA Technical Manual (Occupational Safety and Health Administration, Washington 2006) http://www.osha.gov/dts/osta/otm/otm_iv/otm_iv_4.html
2. K. Bixby: Proactive safety design and implementation criteria, Proc. National Robot Safety Conf. (1991)
3. B.S. Dhillon: Robot Reliability and Safety (Springer, New York 1993)
4. J.H. Graham (Ed.): Safety, Reliability, and Human Factors in Robotic Systems (Van Nostrand Reinhold, New York 1991)
5. ANSI: American National Standard for Industrial Robots and Robot Systems – Safety Requirements, ANSI/RIA R15.06-1986 (American National Standards Institute, New York 1986)