“Comparison of 0.25% Bupivacaine With Tramadol Versus 0.125% Bupivacaine With Tramadol in Epidural B Analgesia for Labor Pain”. Medical Forum Monthly 33, no. 5 (June 1, 2022). Accessed April 17, 2026. https://medicalforummonthly.com/index.php/mfm/article/view/713.