1. Comparison between intravenous patient-controlled analgesia and epidural analgesia in patients undergoing lower abdominal surgery;Aceto;Acta Medica Romana,2002
2. Epidural analgesia following cholecystectomy;Addison;The British Journal of Surgery,1974
3. Effect of continuous postoperative epidural analgesia on intestinal motility;Ahn;British Journal of Surgery,1988
4. The comparison of the effects of general anaesthesia versus combined general/epidural anaesthesia on cardiac enzymes and surgical stress response in lower abdominal surgery;Alpaslan;Journal of Cardiothoracic and Vascular Anesthesia,2010
5. Postoperative patient-controlled analgesia with intravenous tramadol, intravenous fentanyl, epidural tramadol and epidural ropivacaine+fentanyl combination;Aygun;European Journal of Gynaecological Oncology,2004