1. Hemodynamic changes with prone positioning during general anaesthesia;Backofen;Anesth Analg,1985
2. Spinal, epidural and caudal anesthesia;Brown,2005
3. A prospective randomized study comparing peri-operative outcome variables after epidural of general anesthesia for lumbar disc surgery;Demeril;J Neurosurg Anesthesiol,2003
4. Long term follow up of patients who received 10098 spinal anesthetics: failure to discover major neurological sequelae;Dripps;JAMA,1954
5. Spinal anesthesia for disc herniation and lumbar laminectomy: apropos of 77 cases;Hassi;Cah Anesthesiol,1995