C. Cook, and K. Kothiyal. Applied Ergonomics, 29 (6):
439--443(December 1998)http:/www.sciencedirect.com/science/article/B6V1W-3V45PN8-5/2/4a9d3bc4b52d6b5c7376e7a3846aea1e.
A. Delisle, D. Imbeau, B. Santos, A. Plamondon, and Y. Montpetit. Applied Ergonomics, 35 (1):
21--28(January 2004)http://www.sciencedirect.com/science/article/B6V1W-4BHCHRX-1/2/aeda67fa3e97377239e2eee91e554e4f.
G. Adamson, S. Murphy, and D. Stubbs. Pain, In Press, Corrected Proof, (6 December 2006)urlhttp://www.sciencedirect.com/science/article/B6T0K-4MH8BNM-5/2/bbbc596802f8c78b41587cf139389c23.