[1]
I. M. Penttilä, E. Puhakainen, and M. Ryynänen, “Selecting a Sensitive Immunoradiometric Method of Maternal Serum Alphafetoprotein for Prenatal Screening of Abnormalities in the Fetus”, ujms, vol. 95, no. 3, pp. 287-290, Sep. 1990.