ALI, W.; YOUSSEF, H.; ABBAS, A.; ROSHDY, P.; IMBABY, A.; ABDELRADY, M. Intrathecal bupivacaine with fentanyl compared to levobupivacaine with fentanyl for painless labor: a double-blind, randomized clinical trial. Anaesthesia, Pain & Intensive Care, v. 27, n. 4, p. 478-484, 7 jun. 2023.