1. Abbott, M. E.: Atlas of Congenital Cardiac Disease. New York, New York Heart Association, 1936.
2. Barclay, A. E., Franklin, K. J. and Prichard, M. M. L.: The Fetal Circulation and Cardiovascular System and the Changes That They Undergo at Birth. Springfield, Illinois, Charles C Thomas, 1944, p. 275.
3. Dry, T. J. et al.: Congenital Anomalies of the Heart and Great Vessels. Springfield, Illinois, Charles C Thomas, 1948, p. 68.
4. Taussig, H. B.: Congenital Malformations of the Heart. New York, Commonwealth Fund, 1947, p. 618.
5. Nomenclature and Criteria for Diagnosis of Diseases of the Heart. Ed. 4, New York, New York Heart Association, 1947, p. 282.