1. Analysis and measurement of the loads on the lumbar spine during work at a table;Andersson;J. Biomech.,1980
2. Methods of Test for Flexible Polyurethane Foam;BIS,1976
3. Trunk stiffness in axial rotation of tractor drivers and office workers;Boden,1995
4. Trunk axial strength and muscle activity of tractor drivers and office workers during twisting;Boden,1997
5. Weight, Volume and Centre of Mass of Segments of the Human Body;Clauser,1969