LYRENÄS , Sven; NYBERG , Fred; WILLDECK-LUND , Gunilla; LINDSTRÖM , Leif; LINDBERG , Bo; TERENIUS , Lars. Endorphin Activity in Cerebrospinal Fluid Prior to Elective Cesarean Section and in Early Puerperium. Upsala Journal of Medical Sciences, [S. l.], v. 92, n. 1, p. 37–45, 1987. DOI: 10.3109/03009738709178676. Disponível em: https://ujms.net/index.php/ujms/article/view/6894. Acesso em: 13 nov. 2026.