SURESHBABU K; SASIREKHA D; MANIVANNAN P; KAYALVIZHI P; SHANKAR R. Comparative Study of Ropivacaine-Fentanyl Versus Bupivacaine-Fentanyl for Epidural Labour Analgesia -Prospective Randomised Control Study. National Journal of Medical Research, [S. l.], v. 16, n. 04, p. 200–205, 2026. DOI: 10.55489/njmr.160420261299. Disponível em: https://njmr.in/index.php/file/article/view/1299. Acesso em: 2 oct. 2026.