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3. INTERNATIONAL ORGANIZATION FOR STANDARDIZATION, 1992, ISO 10326-1 (E), Mechanical vibration—laboratory method for evaluating vehicle seat vibration. Part 1: basic requirements
4. BRITISH STANDARDS INSTITUTION, 1987, BS 6841, Measurement and evaluation of human exposure to whole-body mechanical vibration and repeated shock
5. INTERNATIONAL ORGANIZATION FOR STANDARDIZATION, 1997, ISO 2631-1 (E), Mechanical vibration and shock—evaluation of human exposure to whole-body vibration. Part 1: general requirements