Pratibha Deshmukh, Medha Sangawar, Nikita Dhumne, and Vivek Chakole. “The Spinal Adjuvent - Intrathecal Nalbuphine As Effective As Intrathecal Fentanyl”. International Journal of Research in Pharmaceutical Sciences 11, no. 3 (July 30, 2020): 4492-4498. Accessed March 5, 2021. https://pharmascope.org/ijrps/article/view/2676.