“A comparative study of low-dose intrathecal bupivacaine 0.5% (heavy), levobupivacaine 0.5% (plain), and levobupivacaine 0.5% (heavy) with fentanyl as an adjuvant in transurethral resection of prostate surgery: A prospective randomized study”, Asian J Med Sci, vol. 15, no. 9, pp. 21–27, Aug. 2024, doi: 10.3126/ajms.v15i9.67682.