1. Cardiac conduction system: fetal and postnatal development;James;Am J Cardiol,1970
2. Arrhythmias in the neonate;Ferrer,1977
3. Arrhythmias in the neonate;Ferrer,1977
4. Diagnosis and Clinical Significance of Parasystole;Chung,1970
5. Diagnosis and Clinical Significance of Parasystole;Chung,1970