VISWANADH, P.; SUBRAMANIAN, S.; BAL, H. An observational study of parenteral paracetamol vis a vis tramadol as labour analgesics. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 10, n. 2, p. 677–682, 2021. DOI: 10.18203/2320-1770.ijrcog20210326. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/9618. Acesso em: 27 oct. 2025.