M. M. . Ullah, “Comparison between Fractionated Dose versus Bolus Dose of Intrathecal Hyperbaric Bupivacaine Injection in Spinal Anesthesia for Patients Undergoing Elective Caesarean Section”, J Shaheed Suhrawardy Med Coll, vol. 13, no. 2, pp. 150–157, Apr. 2023.