Gibson, G.A. : Persistence of the arterial duct and its diagnosis . Edinb. Med. J.8: I, 1900.
2.
Carleton, R.A. , Abelmann, W.H. and Hancock, E.W.: Familial occurrence of congenital heart disease. New Eng. J. Med.259: 1236, 1958.
3.
De la Camp: Familiäres Vorkommen angeborener Herzfehler, zugleich ein beitrag Diagnose der Persistenz des Ductus arterios. Botalli. Berl. Klin. Wschr.40: 48, 1903.
4.
Record, R.G. and McKeown, T.: Observations relating to the aetiology of patent ductus arteriosus. Brit. Heart J.15: 376, 1963.
5.
Ekström, G.: The surgical treatment of patent ductus arteriosus. Acta Chir. Scand. Suppl.169: 1, 1952.
6.
Joyce, J.C. and O'Toole, S.P.: Congenital heart disease. Report on an unusually high incidence in one family . Brit. Med. J.1: 1241, 1954.
7.
Polani, P.E. and Campbell, M.: Factors in the causation of persistent ductus arteriosus. Ann. Hum, Genet.24: 343, 1960.
