A. Bakeer, K. Abdelhamid, D. Nabil, and M. Rawi, “Perioperative Analgesic Efficiency of Ultrasound-Guided Quadratus Lumborum Block versus Epidural Analgesia in Bladder Cancer Patients Undergoing Radical Cystectomy”, Open Access Maced J Med Sci, vol. 10, no. B, pp. 2451–2456, Oct. 2022.