1. [1] Cousins MJ. Neural blockade in clinical anaesthesia and pain medicine. 4th edn. Philadelphia Lippincott William and Wilkins; 2009.
2. Peri-operative thoracic epidural analgesia for thoracotomy;Schultz;Eur J Anaesthesiol,1997
3. [3] Blas ML. The early history of epidural anaesthesia. Journal of Anaesthesia History 1997;15(3):5-6, 15.
4. [4] Zaric D, Nydahl PA, Philipson L, et al. The effect of continuous lumbar epidural infusion of ropivacaine (0.1%, 0.2%, and 0.3%) and 0.25% bupivacaine on sensory and motor block in volunteers: a double-blind study. Reg Anesth 1996;21(1):14-25.
5. Ropivacaine: an update of its use in regional anaesthesia;KJ;Drugs,2000