1. Lumbar disc pressure and myoelectric back muscle activity during sitting—I;Andersson;Scand. J. Rehab. Med.,1974
2. Tensile properties of human annulus fibrosus;Galante;Acta orthop. scand.,1967
3. Static and dynamic articular facet loads;Hakim,1976
4. Contact pressure in the human hip joint measured in vivo;Hodge,1986
5. Biomechanics of the lumbar spine;King,1985