Tawadros, S., A. M. El Mageed, W. A. El Taher, M. Salama, and A. M. Ansary Amin. “Dexmedetomidine Vs. Fentanyl As Adjuvants to Hyperbaric Bupivacaine for Unilateral Spinal Anesthesia in Lower Limb Orthopedic Surgeries: A Randomized Trial”. Anaesthesia, Pain & Intensive Care, Vol. 27, no. 4, June 2023, pp. 456-63, doi:10.35975/apic.v27i4.2191.