Vu, Van Kim Long, et al. “EFFICACY OF INTRATHECAL MORPHINE AFTER LAPAROSCOPIC SURGERY FOR COLORECTAL CANCER AT CAN THO UNIVERSITY OF MEDICINE AND PHARMACY HOSPITAL”. Cantho Journal of Medicine and Pharmacy, no. 5, Mar. 2023, pp. 9-15, doi:10.58490/ctump.2023i5.634.