ANDERSSON, E. The role of the psoas and iliacus muscles for stability and movement of the lumbar spine, pelvis and hip. Scand J Med Sci Sports. 1995, 5, 1, 10-16
ANDERSSON, E. A. Itramuscular EMG from the hip flexor muscles during human locomotion. Acta Physiol Scand. 1997, 161, 3, 361-370
JUKER, D. Quantiative intramuscular myoelectric activity of lumbar portions of psoas and the abdominal wall durng a wide variety of tasks. Med Sci Sports Exerc. 1998, 30, 2, 301-310