1. Jadad A . Individual trials to group of trials: reviews, meta-analysis, and guidelines. In Randomised controlled trials. London: BMJ Books, 1998. ISBN 0727912089.
2. Guyatt G H, Sackett D L, Sinclair J C et al. Users' guides to the medical literature. IX. A method for grading health care recommendations. JAMA 1995; 274: 1800–1904.
3. NHS National Institute for Clinical Excellence. NICE technology appraisal guidance number 1. Guidance on the extraction of wisdom teeth. London: National Institute for Clinical Excellence, 2000.
4. Glenny A M, Worthington H V, Clarkson J E, Esposito M . The appraisal of clinical guidelines in dentistry. Eur J Oral Implantol 2009; 2: 135–143.
5. American Association of Oral and Maxillofacial Surgeons (AAOMS). Wisdom Teeth. 2005-2013. Online information available at
http://www.aaoms.org/wisdom_teeth.php
(accessed June 2013).