3[2]Sharma MC, Arora R, Deol PS, et al. Osteochondroma of the spine: an enigmatic tumor of the spinai cord: A Seyies of cases. J Neuyosurg Sciences, 2002, 46:66 - 77
4[3]Cohen DM, Dahlin DC, MacCarty CS. Apparently solitary tumors of the Vertebral column. Mayo clinproc, 1964, 39: 509 - 528
5Maroon JC.Current concepts in minimally invasive discectomy[J].Neurosurgery,2002,51S:137-145.