1. Twins: Prophylactic hospitalization and ward rest at early gestation;Gilstrap;Obstet Gynecol,1987
2. Plural pregnancies—the cause of plural problems;Seski;Obstet Gynecol,1963
3. Twin pregnancies—a continuing perinatal challenge;Hawrylyshyn;Obstet Gynecol,1982
4. Perinatal factors and neonatal morbidity in twin pregnancy;Ho;Am J Obstet Gynecol,1975
5. Twin pregnancy: The role of active management during pregnancy and delivery;Jouppila;ACTA Obstet Gynecol Scand,1975