Dimmiti Dinesh Raja et al. 2020. Efficacy of Intrathecal Nalbuphine Over Fentanyl as Adjuvant with Ropivacaine in Lower Abdominal and Lower Limb Surgeries. IAR Journal of Medicine and Surgery Research. 3, 3 (Jun. 2020), 14–21. DOI:https://doi.org/10.47310/iarjmsr.2022.V03i03.04.