1. Cardiac arrhythmias in premature infants;Morgan;Pediatrics,1965
2. Intrauterine growth of twins as estimated from liveborn-birth-weight data;Naeye;Pediatrics,1966
3. Intrauterine growth as estimated from liveborn-birth-weight data at 24 to 42 weeks of gestation;Lubchenco;Pediatrics,1963
4. Heart arrhythmias in children;Landtman;Acta paediat.,1947
5. Electrocardiographic findings in healthy premature infants;Levine;Pediatrics,1962