8Williams JL, Allen MB Jr, Harkess JW. Late results of cervical discectomy and interbody fusion: some factors influencing the results. J Bone Joint Surg(Am), 1968, 50: 277-286.
9Choy DS, Ascher PW, Ranu HS, et al. Percutaneous laser disc decompression: a new therapeutic modality. Spine, 1992, 17: 949-956.
10Siebert WE, Berendsen BT, Tollgaard J. Percutaneous laser disk decompression: experience since 1989. Orthopade, 1996, 25: 42-48.