1. Iliopsoas weakness, a clinical sign of lumbar spinal stenosis.;LaBan;Am J Phys Med Rehabil,2004
2. Electromyographic study of function of iliopsoas muscle.;LaBan;Arch Phys Med Rehabil,1965
3. Orthopedic Physical Assessment.;Magee,2002
4. Illustrated Essentials in Orthopedic Physical Assessment.;Evans,1994