Tran , Van Dang, et al. “ANALGESIC EFFICACY OF COMBINED SPINAL-EPIDURAL WITH GENERAL ANESTHESIA DURING AND AFTER LAPAROSCOPIC COLORECTAL SURGERY”. Cantho Journal of Medicine and Pharmacy, no. 34, Mar. 2021, pp. 35-42, https://tapchi.ctump.edu.vn/index.php/ctump/article/view/953.