8SCHMID U D. Microsurgery of lumbar disc prolapse. Superior results of microsurgery as compared to standard and percutaneous procedures( review of literature) [J]. Nervenarzt, 2000, 71 (9) : 265 - 274.
9SAAL J A. Natural h ist ory and nonoperat ive treatment of lumbar discherniat ion[J]. Spine, 1996,21:2 - 9.