Vampugalla PS, Vundi VR, Perumallapalli KS, Kumar CV, Kambar C, Mahalakshmi PM, Pisipati RS. A comparative study of intrathecal ropivacaine with fentanyl and L-bupivacaine with fentanyl in lower abdominal and lower limb surgeries. Int J Basic Clin Pharmacol [Internet]. 2017 Jan. 16 [cited 2025 Oct. 12];4(6):1147-55. Available from: https://www.ijbcp.com/index.php/ijbcp/article/view/707