W. M. Gersony, G. V. Duc, R. B. Dell, J. C. Sinclair: Oxygen method for calculation of right to left shunt: new application in presence of right to left shunting through the ductus arteriosus. In: Cardiovascular research. Bd. 6, Nr. 4, Juli 1972, S. 423–438, PMID 5054313.
C. D’Cunha, K. Sankaran: Persistent fetal circulation. In: Paediatrics & child health. Bd. 6, Nr. 10, Dezember 2001, S. 744–750, PMID 20084150, PMC 2805987 (freier Volltext)