1. Diverticuli of the nerve root sheaths;Basauri, L.; Hudson, H.; Bardales, A.;J. Neurosurg,1969
2. Congenital intraspinal extradural cyst;Bergland, R.M.;J. Neurosurg,1968
3. The radiological appearances of spinal extradural arachnoid cysts;Dastur, H.M.;J. Neurol. Neurosurg. Psychiat,1963
4. Meningocele intrasacrale occulto (rivelato con la mielografia);Enderle, C.;Riv. Neurol,1932
5. Extradural cysts of the spinal canal;Gortvai, P.;J. Neurol. Neurosurg. Psychiat,1963