DiMaggioAMooneyV: Conservative care for low back pain: What works?J Musculoskel Med1987; 4(9): 27–34, 4(12): 63–74
2.
VanharantaHVidemanTMooneyV: Extrac '86, A comparison of McKenzie Exercises, Back Trac and Back School in Lumbar Syndrome. University of Texas Health Science Center at Dallas, Orthopedic Division.