6Ullrich CG,Binet EF,Sanecki MG,et al.Quantitative assessment of the lumbar spinal canal by computed tomography.Radiology,1980,134:134-143.
7Nakai O,Onkawa A,Yamaura I.Long term roentgenographic and functional changes in patients who were treated with wide fenestration for central lumbar stenosis.J Bone Joint Surg(Am),1991,73:1184-1191.
8Burton CV,Kirkaldy-Willis WH,Yong-Hing K,et al.Causes of failure of surgery on the lumbar spine.Clin Orthop,1981,157:191-199.
9Beuls EA,Van-Mameren H,Vroomen PC.Caudascopic experiences and a new patho-anatomic concept for treatment of sciatica.Minim Invasive Neurosurg,1996,39:4-6.
10Brayda B M,Cinnella P.Posterior endoscopic discectomy(and other procedures).Eur Spine J,(2000,9 Suppl 1:S24-29.