1. Muscle action potentials in the study of dynamic anatomy;Allen;British Journal of Physical Medicine,1948
2. Bartholomy, J.K., Chandler, R., Kaplan, S., 2002. Validity Analysis of Fluid Goniometer Measurements on Passive Knee Flexion. Abstact. Motion Analysis Laboratory, School of Physical Therapy, Slippery Rock University, Pennsylvania, USA.
3. Low Back Pain Syndrome;Cailliet,1994
4. Analysis of lumbar spine and hip motion during forward bending in subjects with and without a history of low back pain;Esola;Spine,1996
5. Function of erector spine in flexion of the trunk;Floyd;Lancet,1951