1. Spina bifida occulta;Brickner;Amer. J. Med. Sci.,1918
2. The tethered conus;Fitz;Amer. J. Roentgen.,1975
3. The filum terminale syndrome (contraction syndrome);Garceau;J. Bone Jt. Surg.,1953
4. Myelographie accessment of occult forms of spinal dysraphism;Gryspeerdt;Act. Radial. (Diag.),1963
5. The tethered spinal cord: its protean manifestations, diagnosis and surgical correction;Hoffman;Child’s Brain,1976