YAAKOP, A.; HASSAN, M.; OMAR, S.; MAZLAN, M.; MUKMIN, L.; W. HASSAN, W. N. Tramadol vs. pethidine to control perioperative shivering in cesarean section under spinal anesthesia: a double-blind study. Anaesthesia, Pain & Intensive Care, v. 26, n. 3, p. 283-290, 13 jun. 2022.