1. Fetal cardiac arrhythmias;Shenker;Obstet Gynecol Surv,1979
2. Fetal arrhythmias;Strasburger;Prog Pediatr Cardiol,2000
3. Cardiac Doppler flows during fetal arrhythmias: physiologic consequences;Reed;Obstet Gynecol,1987
4. Irregular heart rate in the fetus-not always benign;Simpson;Cardiol Young,1996
5. Analysis of cases with fetal extrasystole coexisting with cardiac and extracardiac pathology;Włoch;Ginekologia Polska,2003