1. Saunders C.: The Philosophy of Terminal Care, in Saunders C (ed): The Management of Terminal Illness. London Hospital Medical, 1967, pp 193-202
2. Benedetti, Bonica JJ, Bellucci G.: Pathophysiology and therapy of postoperative pain: A review, in Benedetti CR, Morica G (eds): Advances in Pain Research and Therapy. New York, NY, Raven Press, 1984, pp 373-407
3. Pain after thoracic surgery