[1]
H. Unlugenc, MD, S. Tetiker, MD, S. Büyükkurt, MD, T. Guler, MD, and G. Isik, MD, “Comparison of the effect of adding remifentanil to patient-controlled tramadol or morphine for postoperative analgesia after major abdominal surgery”, J of Opioid Management, vol. 5, no. 5, pp. 247–255, Jan. 2018.