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, vol. 11, no. 3, July 2020, pp. 4492-8, https://ijrps.com/home/article/view/1119.