BASIT, S.; KHAN, N.; BANO, A. A comparative study of intrapartum epidural analgesia with intramuscular tramadol on labor outcome. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 13, n. 4, p. 930–934, 2024. DOI: 10.18203/2320-1770.ijrcog20240790. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/13918. Acesso em: 1 feb. 2026.