Dr akash sarawgi, Dr saurabh Kulshreshtha, Dr swati trivedi 2024. “Comparative Clinical Study of Efficacy of Fentanyl as an Adjuvant to Bupivacaine When Compared with Bupivacaine Alone in Patients Under Spinal Anesthesia”. History of Medicine. 10, 1 (Jun. 2024), 247–257. DOI:https://doi.org/10.48047/.