PENTTILÄ , I. M.; RYYNÄNEN , M.; HÄMÄLÄINEN , E.; PUHAKAINEN , E.; SAVOLAINEN , K. 6.1.3.2 Quality Specifications for S-AFP and S-HCG-β Determinations for Screening of Fetal Abnormalities. Upsala Journal of Medical Sciences, [S. l.], v. 98, n. 3, p. 375–380, 1993. DOI: 10.3109/03009739309179335. Disponível em: https://ujms.net/index.php/ujms/article/view/7498. Acesso em: 10 nov. 2026.