Vampugalla, Prem Swarup, Venkata Ramana Vundi, Kamala Subhashini Perumallapalli, Ch. Vinod Kumar, Chandrakala Kambar, P. Mallika Mahalakshmi, and Raja Sulochana Pisipati. “A Comparative Study of Intrathecal Ropivacaine With Fentanyl and L-Bupivacaine With Fentanyl in Lower Abdominal and Lower Limb Surgeries”. International Journal of Basic & Clinical Pharmacology 4, no. 6 (January 16, 2017): 1147–1155. Accessed May 31, 2023. https://www.ijbcp.com/index.php/ijbcp/article/view/707.