1. A murmur that may arise from the ductus arteriosus;D, Burnard F.
2. Patent ductus arteriosus in premature infants;L, Powell M.;Med J Aust,1963
3. Delayed closure of the ductus arteriosus in premature infants;Danilowicz, D.; M, Rudolph A.; E, Hoffman J.I.;Pediatrics,1966
4. Delayed closure of the ductus arteriosus;M, Auld P.A.;J Pediatr,1966
5. Persistent ductus arteriosus in ill and premature babies;J, Girling D.; A, Hallidie-Smith K.;Arch Dis Child,1971