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.
C. Cook, and K. Kothiyal. Applied Ergonomics, 29 (6):
439--443(December 1998)http:/www.sciencedirect.com/science/article/B6V1W-3V45PN8-5/2/4a9d3bc4b52d6b5c7376e7a3846aea1e.
C. Cook, R. Burgess-Limerick, and S. Papalia. International Journal of Industrial Ergonomics, 33 (5):
463--472(May 2004)http://www.sciencedirect.com/science/article/B6V31-4BVPW2H-1/2/8a7fcf14dbae8ac1659bac4364c2516e.
L. Karlqvist, M. Hagberg, and K. Selin. Ergonomics, 37 (7):
1261--1267(July 1994)http://www.sciencedirect.com/science/article/B6WVB-45CWD23-394/2/84cf7c0caa0fecd891fdda65396d45c0.