1. Merskey H, Bogduk N.Classification of Chronic Pain: Description of Chronic Pain Syndromes and Definition of Pain Terms. IASP Press, WA, USA (1994).
2. Macrae WA, Davies HTO. Chronic postsurgical pain. In:Epidemiology of Pain. Crombie IK, Linton S, Croft P, Von Knorff M, LeResche L (Eds). IASP Press, WA, USA 125–142 (1999).
3. Chronic post-surgical pain: 10 years on
4. Postthoracotomy Pain Management Problems
5. Inguinal hernias