KUMAR, P.; KANNA, V.; ., K.; ., A. A clinical study of comparison of effect with 0.15% ropivacaine and fentanyl 2mcg/ml versus 0.125% bupivacaine and fentanyl 2mcg/ml epidurally for labour analgesia. International Journal of Research in Medical Sciences, [S. l.], v. 6, n. 4, p. 1422–1428, 2018. DOI: 10.18203/2320-6012.ijrms20181308. Disponível em: https://www.msjonline.org/index.php/ijrms/article/view/4703. Acesso em: 14 oct. 2025.