1. The vanishing twin;Landy;Acta Genet Med Gemellol,1982
2. Disappearance of one gestational sac in the first trimester of multiple pregnancies—ultrasonographic findings;Brown;J Can Assoc Radiol,1982
3. The prognosis of multiple pregnancy assessed by ultrasonic tomography;Nakano;Acta Obstet Gynaecol Jpn,1981
4. The frequency of ovular resorption during the first trimester of twin pregnancy;Schneider;Acta Genet Med Gemellol,1979
5. Fetus papyraceus in twin pregnancy;Livnat;Obstet Gynecol,1978