Rahman, Mohammad Ashrafur, et al. “Outcome of Low-Dose 0.5% Levobupivacaine (Plain) And Low-Dose 0.5% Bupivacaine (Heavy) Combined With Fentanyl in Spinal Anaesthesia For Transurethral Resection of Prostate: A Comparative Study”. Sir Salimullah Medical College Journal, vol. 30, no. 2, Oct. 2022, pp. 115-22, doi:10.3329/ssmcj.v30i2.61926.