References
- Greig, H. W. , Anson, B. J. , McAfee, D. K. and Kurth, L. E. (1954) The ductus arteriosus and its ligamentous remnant in the adult. Quart. Bull. Northw. Univ. med. Sch., 28, p. 66.
- Kjellberg, S. R. , Mannheimer, E. , Rudhe, U. and Jonsson, B. (1959) Diagnosis of congenital heart disease, Year Book Publishers, Chicago