1. Acute low back problems in adults;Bigos,1994
2. Diagnostic evaluation of low back pain with emphasis on imaging;Jarvik;Ann Intern Med,2002
3. Hoppenfeld S, Physical examination of the spine and extremities. New York (NY): Appleton-Century-Crofts; 1976. p. 118-27, 249-63.
4. The lumbar spine;McKenzie,1981
5. The cervical and thoracic spine;McKenzie,1990