1. Neonatal pneumopericardium;Gershanik;Am J Dis Child,1972
2. Spontaneous pneumopericardium in the newborn infant;Grosfeld;J Pediatr,1970
3. Pneumopericardium in the newborn;Matthieu;Pediatrics,1970
4. Pneumopericardium in the newborn;Shawker;Am J Roentgen,1972
5. Neonatal pneumopericardium;Yeh;Pediatrics,1974