Shah, N., A. Kumari, A. Behl, J. Desai, A. Shah, and D. Chauhan. “A Study to Compare the Effect of Nalbuphine and Butorphanol As an Adjuvant to Intrathecal 0.5% Hyperbaric Bupivacaine for Lower Limb Surgery”. International Journal of Health Sciences, vol. 6, no. S1, Apr. 2022, pp. 3887-96, doi:10.53730/ijhs.v6nS1.5710.