1. Japanese Industrial Association (JIA). Vibration level meters (Standard No. JIS C 1510:1976). Tokyo, Japan: JIA; 1976.
2. International Organization for Standardization (ISO). Mechanical vibration and shock-evaluation of human exposure to whole-body vibration—part 1: general requirements (Standard No. ISO 2631–1: 1997). Geneva, Switzerland: ISO; 1997.