ENGBERG , GRETA. The Use of Ephedrine in Epidural Analgesia. Upsala Journal of Medical Sciences, [S. l.], v. 82, n. 3, p. 183–190, 1977. DOI: 10.3109/03009737709179098. Disponível em: https://ujms.net/index.php/ujms/article/view/7260. Acesso em: 15 nov. 2026.