Kumar, Sumanta, et al. “COMPARATIVE STUDY OF ISOBARIC 0.5% LEVOBUPIVACAINE COMBINED WITH 50MCG FENTANYL VERSUS ISOBARIC RACEMIC MIXTURE OF 0.5% BUPIVACAINE COMBINED WITH 50MCG FENTANYL IN LUMBAR EPIDURAL ANAESTHESIA FOR ELECTIVE INFRAUMBILICAL SURGERY”. Journal of Advanced Research in Medical and Health Science (ISSN 2208-2425), vol. 12, no. 1, Feb. 2026, pp. 16-24, https://doi.org/10.61841/3vgrzv48.