“Comparison of 0.25% Bupivacaine with Tramadol Versus 0.125% Bupivacaine with Tramadol in Epidural B Analgesia for Labor Pain” (2024) Medical Forum Monthly, 33(5). Available at: https://medicalforummonthly.com/index.php/mfm/article/view/713 (Accessed: 26 December 2025).