A Comparative Randomized Control Study of Continuous Spinal Anaesthesia with Continuous Epidural Anaesthesia in Elderly Patients Undergoing Dynamic Hip Screw Surgeries - Kattamanchi, Sreenivasulu; Tharigonda, Balaji; Meenakshi, Ganesh Sree; Neelakrishnaveni, Kaki (Archives of Anesthesiology and Critical Care, 2022)