1. Nonimmunologic hydrops fetalis;Perlin, B.M.; Pomerance, J.J.; Schifrin, B.S.;Obstet Gynecol,1981
2. Echocardiographic and anatomical correlates in the fetus;Allan, L.D.; Tynan, M.J.; Campell, S.; Wilkinson, J.L.; Anderson, R.H.;Br Heart J,1980
3. Neonatal circulatory changes: an echocardiographic study. Pediatrics 1977; 59: 338-44. ' Redel DA, Hansman M. Fetal obstruction of the foramen ovale detected by two-dimensional doppler echocardiography;Riggs, T.; Hirschfeld, S.; Bormuth, C.; Fanaroff, A.; Liebman, J.,1981
4. Pathophysiologic consideration and etiologic classification;Clin Pediatr (Phila),1980