1. Dubuisson (1983). Nerve root damage and arachnoiditis. In Wall and Melzack (eds.) Tertbbok of Pain, p. 442. ( London: Churchill Livingstone )
2. Frykholm (1971). The clinical picture. In Hirsch and Zotterman (eds.) Cervical Pain, p. 5. ( Oxford: Pergamon Press )
3. Hitzelberger and Witton (1968). Abnormal myelograins in asymptomatic patients. J. Neurosurg., 28, 204
4. Kelly (1958). Is pain due to pressure on nerves? Neurology, 6, 32–36
5. Frickholm (1951). Cervical nerve root compression resulting from disc degeneration and root sleeve fibrosis. Acta Chirugica Scand., (Suppl.) 160, 11–49