1. Bernard BP, editor. Musculoskeletal disorders and workplace factors: a critical review of epidemiologic evidence for work-related musculoskeletal disorders of the neck, upper extremity, and low back (NIOSH Publication No. 97-141). Cincinnati, OH, USA: National Institute for Occupational Safety and Health (NIOSH); 1997. Retrieved August 31, 2010, from: http://www.cdc.gov/niosh/docs/97-141/
2. Goniometer and torsiometer operating manual. Cwmfelinfach, Gwent, UK: Biometrics; 2002.
3. Kumar S. Cumulative load and models. In Kumar S, editor, Biomechanics in ergo-nom ics. 2nd ed. Boca Raton, FL, USA; CRC Press: 2008. p. 597–632.