1. Formal risk scoring during pregnancy;Alexander,1989
2. On the etiopathogenesis and therapy of Down syndrome;Antila;International Journal of Developmental Biology,1989
3. Intra-amniotic infection in patients with intact membranes and preterm labour;Armer;Obstetrical and Gynecological Survey,1991
4. Post-term pregnancy: magnitude of the problem;Bakketeig,1989
5. Reduced serum inhibition of platelet-activating factor in pre-eclampsia;Benedetto;American Journal of Obstetrics and Gynecology,1989