1. Annular incision technique on the strength and multidirectional flexibility of the healing intervertebral disc;Ahlgren;Spine,1994
2. Bland, M., 1995. An Introduction to Medical Statistics. Oxford University Press, Oxford, p. 134–135.
3. Bogduk, N., 1997. Clinical Anatomy of the Lumbar Spine, 3rd edition. Churchill Livingstone, Melbourne, pp. 13–25.
4. Change of disc height, radial disc bulge, and intradiscal pressure from discectomy: an in vitro investigation on human lumbar discs;Brinckmann;Spine,1991
5. Chiu, E.J., Lotz, J.C., Majumdar, S., 1995. High resolution magnetic resonance imaging of the human intervertebral disc with compression. Proceedings of the 41st Annual Meeting of the Orthopaedic Research Society, Orlando, Florida.