1. Abdullah A. F., Ditto E. W., Bryd E. B. et al.: Extreme-lateral lumbar disc herniation. J. Neurosurg. 41: 229–235, 1974.
2. Aird R. B., Naffziger J. C.: Prolonged jugular compression-new diagnostic test of neurological value. Proc. Am. Neurol. Ass. 66: 45–49, 1940.
3. Alexander G. L.: Prolapsed intervertebral discs. Edimb. Med. J. 54: 14–29, 1947.
4. Armstrong J. R.: Lumbar disc lesions. Pathogenesis and treatment of low back pain and sciatica. Third Edition. E. and S. Livingstone, Edinburgh, 1967.
5. Biering-Sorensen F.: Physical measurements as risk indicators for low-back trouble over a one-year period. Spine 9: 106–119, 1984.