KUTI, O; FAPONLE, AF; ADEYEMI, AB; OWOLABI, AT. Pain Relief in labour: A randomized controlled trial comparing pentazocine with Tramadol. Nepal Journal of Obstetrics and Gynaecology, [S. l.], v. 3, n. 1, p. 14–18, 2008. Disponível em: https://nepjol.info./index.php/NJOG/article/view/1433. Acesso em: 26 apr. 2025.