1. Kroemer KHE. Ergonomic design of material handling systems. Boca Raton, FL, USA: Lewis; 1997.
2. Halpern M. Job and task analysis. In: Murphy DC, editor. Ergonomics and the dental care worker. Washington, DC, USA: American Public Health Association; 1998. p. 83–112.
3. Chaffin DB, Andersson GBJ, Martin BJ. Occupational biomechanics. 3rd ed. New York, NY, USA: Wiley; 1999.