“A prospective comparative study of levobupivacaine hydrochloride 0.5% with ropivacaine hydrochloride 0.75% for peri-operative epidural anesthesia in infra- umbilical surgeries”, Asian J Med Sci, vol. 15, no. 12, pp. 33–39, Dec. 2024, doi: 10.3126/ajms.v15i12.69595.